How can I use a function answer as a variable in another function?

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Brianna Biondo 2021-6-23

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https://ww2.mathworks.cn/matlabcentral/answers/863605-how-can-i-use-a-function-answer-as-a-variable-in-another-function

评论： dpb 2021-6-23

I need to make a function dXdt. One of the variables is N. N is found with the function dNdt, so N has multiple answers, 145 x 1 is the array made. which doesnt work very well as a variable. I cant do a nested function because N is needed and N is not in the function of the original equation. How would I use the solution of dNdt as a variable? Would I need a for loop? And if so how would I go about doing that for an array so large?

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millercommamatt 2021-6-23

does dXdt only accept scalars?

dpb 2021-6-23

"N has multiple answers, 145 x 1 is the array made. which doesnt work very well as a variable"

N is a perfectly valid variable name for a vector array -- what's wrong with just passing it to the function?

We would have to see the definition of the function dXdt; it would, of course, have to know what to do with the vector input (but it'll have to be able to handle a145 single inputs otherwise which, if you think a vector is cumbersome, just try writing that!!! :) )

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