Calling a function in another function

Question

Haojie 2012-7-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43253-calling-a-function-in-another-function

编辑： Anmol Pardeshi 2018-4-8

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I am really new to matlab. When I　wrote two functions like this:

funw.m

function q = funw(t)

h=0;

r=1/7;

 q = quadl(@(x) sqrt(t^(2*r)-x.^(2*r)),h,t)...
 -quadl (@(x) sqrt(x.^(2*r)-t^(2*r)),t,(h+2));

return

VentRate.m

function w = VentRate

global elev;

global h;

w = fzero(@funw,(h+elev)/2);

return

I try to use VentRate to call funw, by typing VentRate in the command window, but it will show some error. However, if i directly write w = fzero(@funw,(h+elev)/2) in the command window, it will run without error. So can anyone tell me what is wrong with the second function? I appreciate your help.

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Answer 1

Anmol Pardeshi 2018-4-8

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/43253-calling-a-function-in-another-function#answer_314007

编辑：Anmol Pardeshi 2018-4-8

there are 2 pointers on this -

a. why are you keen on calling the funw function within a function; this is especially concerning because function ventRate does not take any input

b. the reason (i suspect this..not sure) for the error is because there is no input to the function. It is the way functions are built or the way their syntax is. No input field to a function may not be acceptable. Trying passing pseudo (fake or nonused) parameters to the ventRate function and see if it works.