Admin
1
For example, if I want to get an integer from user, and use input function:
prompt = "please input the sigma value for Gaussian filtering"
sigma = input(prompt)
will give an error message
while
prompt = 'Please input the sigma value for Gaussian filtering'
sigma = input(prompt)
will successfully run and get the user input.
My question is, what is the difference between "" and ''?
Thank you.
While character arrays and strings are interchangeable in many ways, there are some differences.
Here is my favorite example for students:
>> a = ['1','2']
vs
>> b = ["1","2"]
The resulting a is the character array '12' while b is a 1x2 string array with entries "1" and "2".
A second, hopefully even more illuminating example, is
>> d = sprintf("%1.2e1",3.4)
>> e = sprintf('%1.2e1',3.4)
>> d(1)
>> e(1)
Notice how both styles can be used in string manipulation functions such as sprintf, but the resulting arrays are 1x1 for d and 1xn for e
The single quote is used to define a character array.
Starting from version R2017a, double quote is used to define a String. From what I remember, it can’t be used at all before that version.
For more information you can look here.
