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Display Format for Numeric Values
By default, MATLAB^{®} uses a 5digit short format to display numbers. For example,
You can change the display in the Command Window or Editor using the function.
Using the function only sets the format for the current MATLAB session. To set the format for subsequent sessions, click Preferences on the Home tab in the Environment section. Select > , and then choose a Numeric format option.
The following table summarizes the numeric output format options.
Result  Example  

Short, fixeddecimal format with 4 digits after the decimal point.  
Long, fixeddecimal format with 15 digits after the decimal point for values, and 7 digits after the decimal point for values.  
Short scientific notation with 4 digits after the decimal point.  
Long scientific notation with 15 digits after the decimal point for values, and 7 digits after the decimal point for values.  
Short, fixeddecimal format or scientific notation, whichever is more compact, with a total of 5 digits.  
Long, fixeddecimal format or scientific notation, whichever is more compact, with a total of 15 digits for values, and 7 digits for values.  
Short engineering notation (exponent is a multiple of 3) with 4 digits after the decimal point.  
Long engineering notation (exponent is a multiple of 3) with 15 significant digits.  
Positive/Negative format with , , and blank characters displayed for positive, negative, and zero elements.  
Currency format with 2 digits after the decimal point.  
Hexadecimal representation of a binary doubleprecision number.  
Ratio of small integers. 
The display format only affects how numbers are displayed, not how they are stored in MATLAB.
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Frequently Asked Questions
What is the default number format in MATLAB?
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Format Output
MATLAB^{®} displays output in both the Command Window and the Live Editor. You can format the output display using several provided options.
Format Line Spacing in Output
By default, MATLAB displays blanks lines in Command Window output.
You can select one of two line spacing options in MATLAB.
— Keeps the display of blank lines (default).
>> x = [4/3 1.2345e6] x = 1.3333 0.0000— Suppresses the display of blank lines.
>> x = [4/3 1.2345e6] x = 1.3333 0.0000
To change the line spacing option, do one of the following:
On the Home tab, in the Environment section, click Preferences. Select > , and then choose a Line spacing option.
Use the function at the command line, for example:
format loose format compact
Note
Line spacing options do not apply in the Live Editor.
Format FloatingPoint Numbers
You can change the way numbers display in both the Command Window and the Live Editor. By default, MATLAB uses the short format (5digit scaled, fixedpoint values).
For example, suppose that you enter in the Command Window. The MATLAB output display depends on the format you selected. This table shows some of the available numeric display formats, and their corresponding output.
Numeric Display Format  Example Output 

(default)  
Note
The text display format affects only how numbers are shown, not how MATLAB computes, or saves them.
To format the way numbers display, do one of the following:
On the Home tab, in the Environment section, click Preferences. Select > , and then choose a Numeric format option.
Use the function, for example:
format short format shorte format longSee the reference page for a list and description of all supported numeric formats.
Wrap Lines of Code to Fit Window Width
A line of code or its output can exceed the width of the Command Window, requiring you to use the horizontal scroll bar to view the entire line. To break a single line of input or output into multiple lines to fit within the current width of the Command Window:
On the Home tab, in the Environment section, click Preferences. Select > .
Select Wrap Lines.
Click OK.
Note
Line wrapping options do not apply in the Live Editor.
Suppress Output
To suppress code output, add a semicolon (;) to the end of a command. This is useful when code generates large matrices.
Running the following code creates , but does not show the resulting matrix in the Command Window or the Live Editor:
View Output by Page
Output in the Command Window might exceed the visible portion of the window. You can view the output, one screen at a time:
In the Command Window, type to enable paged output.
Type the command that generates large output.
View the output:
Advance to the next line by pressing Enter.
Advance to the next page by pressing Space Bar.
Stop displaying the output by pressing q.
To disable paged output, type .
Note
Paged output options do not apply in the Live Editor.
Clear the Command Window
If the Command Window seems cluttered, you can clear all the text (without clearing the workspace) by doing one of the following:
On the Home tab, in the Code section, select > to clear the Command Window scroll buffer.
Use the function to clear the Command Window scroll buffer.
Use the function to clear your current view of the Command Window, without clearing the scroll buffer.
See Also
  
Number matlab format
Format Numbers in a Table
Generate Random Numbers
Generate a 4by4 array of random numbers. Initialize the random number generator using a seed of , so that each time the example runs, produces the same numbers.
The numbers display with a precision of 15 digits after the decimal point.
Create a Document
Import the DOM package so that you do not have to use long, fullyqualified class names.
Create a PDF document. To create a Microsoft® Word, HTML, or singlefile HTML document, change " to ", ", or ", respectively.
Create a Table
Create a DOM table from the array of random numbers.
Specify the Table Style
Specify that numbers in the table have a precision of 3 digits after the decimal point by using an object. Specify the table width, border, and column and row separators.
Center the table entries in the table cells.
Generate the Report
Append the table to the document. Close and view the document.
See Also
 
Related Topics
Sours: https://www.mathworks.com/help/rptgen/ug/format_numbers_in_a_table.htmlSelect a Web Site
Formatting Text
To convert data to text and control its format, you can use formatting operators with common conversion functions, such as and . These operators control notation, alignment, significant digits, and so on. They are similar to those used by the function in the C programming language. Typical uses for formatted text include text for display and output files.
For example, converts floatingpoint values to text using fixedpoint notation. Adjust the format by adding information to the operator, such as to represent two digits after the decimal mark, or to represent 12 characters in the output, padding with spaces as needed.
You can combine operators with ordinary text and special characters in a format specifier. For instance, inserts a newline character.
Functions that support formatting operators are , , , , and the error handling functions , , , and .
Fields of the Formatting Operator
A formatting operator can have six fields, as shown in the figure. From right to left, the fields are the conversion character, subtype, precision, field width, flags, and numeric identifier. (Space characters are not allowed in the operator. They are shown here only to improve readability of the figure.) The conversion character is the only required field, along with the leading character.
Conversion Character
The conversion character specifies the notation of the output. It consists of a single character and appears last in the format specifier.
Specifier  Description 

Single character.  
Decimal notation (signed).  
Exponential notation (using a lowercase , as in ).  
Exponential notation (using an uppercase , as in ).  
Fixedpoint notation.  
The more compact of or . (Insignificant zeroes do not print.)  
Same as , but using an uppercase .  
Octal notation (unsigned).  
Character vector or string array.  
Decimal notation (unsigned).  
Hexadecimal notation (unsigned, using lowercase letters –).  
Hexadecimal notation (unsigned, using uppercase letters –). 
For example, format the number 46 using different conversion characters to display the number in decimal, fixedpoint, exponential, and hexadecimal formats.
Subtype
The subtype field is a single alphabetic character that immediately precedes the conversion character. Without the subtype field, the conversion characters , , , and treat input data as integers. To treat input data as floatingpoint values instead and convert them to octal, decimal, or hexadecimal representations, use one of following subtype specifiers.
The input data are doubleprecision floatingpoint values rather than unsigned integers. For example, to print a doubleprecision value in hexadecimal, use a format like . 
The input data are singleprecision floatingpoint values rather than unsigned integers. 
Precision
The precision field in a formatting operator is a nonnegative integer that immediately follows a period. For example, in the operator , the precision is . For the operator, the precision indicates the number of significant digits to display. For the , , and operators, the precision indicates how many digits to display to the right of the decimal point.
Display numbers to different precisions using the precision field.
While you can specify the precision in a formatting operator for input text (for example, in the operator), there is usually no reason to do so. If you specify the precision as , and is less than the number of characters in the input text, then the output contains only the first characters.
Field Width
The field width in a formatting operator is a nonnegative integer that specifies the number of digits or characters in the output when formatting input values. For example, in the operator , the field width is .
Specify different field widths. To show the width for each output, use the character. By default, the output text is padded with space characters when the field width is greater than the number of characters.
When used on text input, the field width can determine whether to pad the output text with spaces. If the field width is less than or equal to the number of characters in the input text, then it has no effect.
Flags
Optional flags control additional formatting of the output text. The table describes the characters you can use as flags.
Character  Description  Example 

Minus sign ()  Leftjustify the converted argument in its field.  
Plus sign ()  For numeric values, always print a leading sign character ( or ).  
Space  Insert a space before the value.  
Zero ()  Pad with zeroes rather than spaces.  
Pound sign ()  Modify selected numeric conversions:

Right and leftjustify the output. The default behavior is to rightjustify the output text.
Display a sign for positive numbers. The default behavior is to omit the leading sign for positive numbers.
Pad to the left with spaces and zeroes. The default behavior is to pad with spaces.
Note
You can specify more than one flag in a formatting operator.
Value Identifiers
By default, functions such as insert values from input arguments into the output text in sequential order. To process the input arguments in a nonsequential order, specify the order using numeric identifiers in the format specifier. Specify nonsequential arguments with an integer immediately following the sign, followed by a sign.
Ordered Sequentially  Ordered By Identifier 

sprintf('%s %s %s',... '1st','2nd','3rd') ans = '1st 2nd 3rd'  sprintf('%3$s %2$s %1$s',... '1st','2nd','3rd') ans = '3rd 2nd 1st' 
Special Characters
Special characters can be part of the output text. But because they cannot be entered as ordinary text, they require specific character sequences to represent them. To insert special characters into output text, use any of the character sequences in the table.
Special Character  Representation in Format Specifier 

Single quotation mark  
Percent character  
Backslash  
Alarm  
Backspace  
Form feed  
New line  
Carriage return  
Horizontal tab  
Vertical tab  
Character whose Unicode^{®} numeric value can be represented by the hexadecimal number,  Example: returns 
Character whose Unicode numeric value can be represented by the octal number,  Example: returns 
Setting Field Width and Precision
The formatting operator follows a set of rules for formatting output text to the specified field width and precision. You also can specify values for the field width and precision outside the format specifier, and use numbered identifiers with the field width and precision.
Rules for Formatting Precision and Field Width
The figure illustrates how the field width and precision settings affect the output of the formatting functions. In this figure, the zero following the sign in the formatting operator means to add leading zeroes to the output text rather than space characters.
If the precision is not specified, then it defaults to six.
If the precision is less than the number of digits in the fractional part of the input, then only digits are shown after the decimal point. The fractional value is rounded in the output.
If the precision is greater than the number of digits in the fractional part of the input, then digits are shown after the decimal point. The fractional part is extended to the right with zeroes in the output.
If the field width is not specified, then it defaults to , where is the number of digits in the whole part of the input value.
If the field width is greater than , then the whole part of the output value is padded to the left with additional characters. The additional characters are space characters unless the formatting operator includes the flag. In that case, the additional characters are zeroes.
Specify Field Width and Precision Outside Format Specifier
You can specify the field width and precision using values from a sequential argument list. Use an asterisk () in place of the field width or precision fields of the formatting operator.
For example, format and display three numbers. In each case, use an asterisk to specify that the field width or precision come from input arguments that follow the format specifier.
The table describes the effects of each formatting operator in the example.
Formatting Operator  Description 

Specify width as the following input argument, .  
Specify precision as the following input argument, .  
Specify width and precision as the following input arguments, , and . 
You can mix the two styles. For example, get the field width from the following input argument and the precision from the format specifier.
Specify Numbered Identifiers in Width and Precision Fields
You also can specify field width and precision as values from a nonsequential argument list, using an alternate syntax shown in the figure. Within the formatting operator, specify the field width and precision with asterisks that follow numbered identifiers and signs. Specify the values of the field width and precision with input arguments that follow the format specifier.
For example, format and display three numbers. In each case, use a numbered identifier to specify that the field width or precision come from input arguments that follow the format specifier.
The table describes the effect of each formatting operator in the example.
Formatting Operator  Description 

specifies the first input argument, , as the value  
specifies the fourth input argument, , as the field width  
specifies the second input argument, , as the value  
specifies the fifth input argument, , as the precision  
specifies the third input argument, , as the value  
specifies the sixth input argument, , as the field width  
specifies the seventh input argument, , as the precision 
Restrictions on Using Identifiers
If any of the formatting operators include an identifier field, then all the operators in the format specifier must include identifier fields. If you use both sequential and nonsequential ordering in the same function call, then the output is truncated at the first switch between sequential and nonsequential identifiers.
Valid Syntax  Invalid Syntax 

sprintf('%d %d %d %d',... 1,2,3,4) ans = '1 2 3 4'  sprintf('%d %3$d %d %d',... 1,2,3,4) ans = '1 ' 
If your function call provides more input arguments than there are formatting operators in the format specifier, then the operators are reused. However, only function calls that use sequential ordering reuse formatting operators. You cannot reuse formatting operators when you use numbered identifiers.
Valid Syntax  Invalid Syntax 

sprintf('%d',1,2,3,4) ans = '1234'  sprintf('%1$d',1,2,3,4) ans = '1' 
If you use numbered identifiers when the input data is a vector or array, then the output does not contain formatted data.
Valid Syntax  Invalid Syntax 

v = [1.4 2.7 3.1]; sprintf('%.4f %.4f %.4f',v) ans = '1.4000 2.7000 3.1000'  v = [1.4 2.7 3.1]; sprintf('%3$.4f %1$.4f %2$.4f',v) ans = 1×0 empty char array 
See Also
  
Related Topics
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MATLAB Function Reference 
Set display format for output
Graphical Interface
As an alternative to , use preferences. Select Preferences from the File menu in the MATLAB desktop and use Command Window preferences.
Syntax
 format format format('')
Description
Use the function to control the output format of numeric values displayed in the Command Window.
Note The function affects only how numbers are displayed, not how MATLAB computes or saves them. 
by itself, changes the output format to the default appropriate for the class of the variable currently being used. For floatingpoint variables, for example, the default is (i.e., 5digit scaled, fixedpoint values).
changes the format to the specified . The tables shown below list the allowable values for .
is the function form of the syntax.
The tables below show the allowable values for , and provides an example for each type using .
Use these format types to switch between different output display formats for floatingpoint variables.
Type  Result  Example 
Scaled fixed point format, with 5 digits  
Scaled fixed point format, with 15 digits for double; 7 digits for single.  
Floating point format, with 5 digits.  
Floating point format, with 15 digits for double; 7 digits for single.  
Best of fixed or floating point, with 5 digits.  
Best of fixed or floating point, with 15 digits for double; 7 digits for single.  
Engineering format that has at least 5 digits and a power that is a multiple of three  
Engineering format that has exactly 16 significant digits and a power that is a multiple of three 
Use these format types to switch between different output display formats for all numeric variables.
Value for type  Result  Example 
+, , blank  
Fixed dollars and cents  
Hexadecimal (hexadecimal representation of a binary doubleprecision number)  
Ratio of small integers 
Use these format types to used to affect the spacing in the display of all variables.
Value for type  Result  Example 
Suppresses excess line feeds to show more output in a single screen. Contrast with .  
Adds linefeeds to make output more readable. Contrast with . 
Remarks
Computations on floatingpoint variables, namely or , are done in appropriate floatingpoint precision, no matter how those variables are displayed. Computations on integer variables are done natively in integer.
MATLAB always displays integer variables to the appropriate number of digits for the class. For example, MATLAB uses three digits to display numbers of type (i.e., 128:127). Setting to or does not affect the display of integer variables.
The specified format applies only to the current MATLAB session. To maintain a format across sessions, use MATLAB preferences.
To see which is currently in use, type
To see if or formatting is currently selected, type
Examples
Example 1
Change the format to by typing
View the result for the value of by typing
 pi ans = 3.14159265358979
View the current format by typing
 get(0,'format') ans = long
Set the format to by typing
or use the function form of the syntax
Example 2
When the format is set to , both and display as 5digit values:
 format short pi ans = 3.1416 single(pi) ans = 3.1416
Now set format to , and displays a 15digit value while display an 8digit value:
 format long pi ans = 3.14159265358979 single(pi) ans = 3.1415927
Example 3
Set the format to its default, and display the maximum values for integers and real numbers in MATLAB:
 format intmax('uint64') ans = 18446744073709551615 realmax ans = 1.7977e+308
Now change the format to hexadecimal, and display these same values:
 format hex intmax('uint64') ans = ffffffffffffffff realmax ans = 7fefffffffffffff
The hexadecimal display corresponds to the internal representation of the value. It is not the same as the hexadecimal notation in the C programming language.
Example 4
This example illustrates the and formats. The value assigned to variable increases by a multiple of 10 each time through the loop.
 A = 5.123456789; for k=1:10 disp(A) A = A * 10; end
The values displayed for are shown here. The power of 10 is always a multiple of 3. The value itself is expressed in 5 or more digits for the format, and in exactly 15 digits for :
 format short eng format long eng 5.1235e+000 5.12345678900000e+000 51.2346e+000 51.2345678900000e+000 512.3457e+000 512.345678900000e+000 5.1235e+003 5.12345678900000e+003 51.2346e+003 51.2345678900000e+003 512.3457e+003 512.345678900000e+003 5.1235e+006 5.12345678900000e+006 51.2346e+006 51.2345678900000e+006 512.3457e+006 512.345678900000e+006 5.1235e+009 5.12345678900000e+009
Algorithms
If the largest element of a matrix is larger than 10^{3} or smaller than 10^{3}, MATLAB applies a common scale factor for the short and long formats. The function displays +, , and blank characters for positive, negative, and zero elements. displays the hexadecimal representation of a binary doubleprecision number. uses a continued fraction algorithm to approximate floatingpoint values by ratios of small integers. See for the complete code.
See Also
, , , , , , , , , ,
for  fplot 
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