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These are my inputs how can i use str2num in title so that i can display the values of inputs?

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s
s 2015-6-18
编辑： Stephen23 2015-6-18
A=input('amplitude= ')
N=input('period= ')
I get the following errors ??? Error using ==> title at 29 Incorrect number of input arguments
Error in ==> title at 23 h = title(gca,varargin{:});
how can i solve the issue?

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回答（2 个）

Walter Roberson
Walter Roberson 2015-6-18
A=input('amplitude= ')
N=input('period= ')
title(sprintf('Amplitude = %f mm, Period = %f s', A, N))
Stephen23
Stephen23 2015-6-18
编辑：Stephen23 2015-6-18
It is more much robust to use the 's' option for input, which can be used like this:
A = str2double(input('amplitude= ','s'));
N = str2double(input('period= ','s'));
title(sprintf('Amplitude = %g mm, Period = %g s', A, N))
This avoids the possibility of arbitrary code being input and executed, which is what input without the 's' option will do.

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