Create an inputParser object and add a required input named myinput to the input scheme.
p = inputParser;
argName = 'myinput';
addRequired(p,argName)
Call the parse function with the input value 7, and display the results.
parse(p,7)
p.Results
ans = struct with fields:
myinput: 7
Validate Required Input Is Nonnegative
Create an input parser scheme that checks that a required input is a
nonnegative, numeric scalar. The syntax @(x) creates a handle to an
anonymous function with one input.
The value of 'num' is invalid. It must satisfy the function: @(x)(x>0)&&isnumeric(x)&&isscalar(x).
Validate Required Input Using validateattributes
Create an inputParser object and define a validation
function using validateattributes. The validation
function tests that a required input is numeric, positive, and even.
Parse an input character vector. Parse fails because the input is
invalid.
parse(p,'hello')
The value of 'evenPosNum' is invalid. Expected input to be one of these types:
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64
Instead its type was char.
Parse an odd number. Parse fails because the input is invalid.
parse(p,13)
The value of 'evenPosNum' is invalid. Expected input to be even.
Input parser scheme, specified as an inputParser object.
argName — Name of input argument character vector | string scalar
Name of the input argument, specified as a character vector or string scalar.
Example: 'firstName'
Example: 'address'
Data Types: char | string
validationFcn — Function to validate argument function handle
Function to validate an argument, specified as a function handle.
The function handle must be associated with a function that returns true or false, or passes a test, or throws an error. Both types of functions must accept a single input argument.