How to change my unit to SI?

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Samy Ben Thabet
Samy Ben Thabet 2018-10-9
回答： Image Analyst 2018-10-9
Hi I am writing a program that calculates the area of a given shape, here is an example for a square. The problem is that when I enter s=5, the end result of A is 2809 when it should be 25.
Here is the program
h=input('What shape do you want?:','s'); if strcmp(h, 'square') s=input('The length of a side is (m):','s'); A=s*s disp(A) end

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Star Strider
Star Strider 2018-10-9
The problem is that you do not want to use the 's' option if you want a numeric input. (The 's' specifies a char input.)
Do this instead:
s=input('The length of a side is (m): ');
That will give you a numeric result for ‘s’ here.

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Image Analyst
Image Analyst 2018-10-9
For what it's worth, see my attached spatial calibration demo.

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