passing argument between functions

Question

Elias Moubayed 2021-6-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/866255-passing-argument-between-functions

回答： Walter Roberson 2021-6-27

i have 2 functions both don't have input arguments they take inputs using input functions

function [t,v] = polystep()
x = input(prompt1);
y = input(prompt2);
z = input(prompt3);

and

function ppp = polysys()
x1 = input(prompt1);
y1= input(prompt2);
z1  = input(prompt3);

i want to call polytep in polysys and give x,y,z the values of x1,y1,z1. is there any way to do this ?

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Answer 1

Bhaskar R 2021-6-27

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https://ww2.mathworks.cn/matlabcentral/answers/866255-passing-argument-between-functions#answer_734425

编辑：Bhaskar R 2021-6-27

在 MATLAB Online 中打开

Assign x, y, z output of polystep, that can make your requirement possible

function [t,v, x, y, z] = polystep()
x = input('prompt1');
y = input('prompt2');
z = input('prompt3');

Then

function ppp = polysys()
[~,~, x1, y1, z1] = polystep();

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Elias Moubayed 2021-6-27

i tried it and it didn't work when it reached polystep it asked again for the inputs

Bhaskar R 2021-6-27

在 MATLAB Online 中打开

Have you removed following statements in polysys function ?

x1 = input(prompt1);
y1= input(prompt2);
z1  = input(prompt3);

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Answer 2

Walter Roberson 2021-6-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/866255-passing-argument-between-functions#answer_734470

Yes, it is possible without modifying polystep() or polysys() . However, doing so would be a Bad Idea that would interfere with using input() for other purposes: You would have to replace MATLAB's input() function with a different function that took note of what prompt was passed in and used it to decide whether to make a real input() call (and memorize the results) or else instead pull back one of the recorded values. The code would have to be aware of what the form is of the prompts for the two different functions in order to be able to figure out whether the prompt it was passed should be treated as a new request or else to return one of the previous values that it memorized.

I recommend against this approach in any form.

Instead you should modify your existing functions to only prompt once and then pass the results around as needed, the way that @Bhaskar R shows.