Passing a function value to another function
显示 更早的评论
To whom it may concern:
I am aware that there is documentation to support this question, I haven't been able to implement a simple solution that isn't beyond my abilities. I have a function that calculates the fluid height inside a reservoir. I would like to pass this value to another function where I define the fluid height as a constant. I need to keep two seperate function files, actualise_level and intialise_level. What might you suggest? Thanks
FIRST FUNCTION:
function [ reservoir ] = actualise_level( reservoir, vol_in, vol_out)
constants;
reservoir(VOLUME) = VOLUME + (vol_in - vol_out) * DT
if reservoir(VOLUME) < 0
reservoir(VOLUME) = reservoir(VOLUME) + abs(min(reservoir(VOLUME)))
end
x = sqrt(4*BASE_INF^2*HEIGHT^2+8*(((BASE_SUP-BASE_INF)*HEIGHT*VOLUME)./LENGTH)) y = 2*HEIGHT*BASE_INF
if x >= y
h1 = (x-y)./(2*(BASE_SUP-BASE_INF)) %h1 is the fluid level as calculated
else error('No solution')
end
end
SECOND FUNCTION:
function [ reservoir ] = initialise_reservoir()
constants;
reservoir = zeros(1,NB_PARAMETERS_RESERV);
reservoir(BASE_INF) = 5; reservoir(BASE_SUP) = 7.5; reservoir(HEIGHT) = 25; reservoir(LENGTH) = 5; reservoir(VOLUME) = 350; reservoir(LEVEL) = h1? %this is where I would like to pass the value in
reservoir = [reservoir(BASE_INF) reservoir(BASE_SUP) reservoir(HEIGHT) ... reservoir(LENGTH) reservoir(VOLUME) reservoir(LEVEL)];
end
3 个评论
I would suggest that you store your parameters in a structure , which would be much clearer for you to work with. Rather than that very awkward
reservoir(index) = ...
you can simply do this:
params.base_ind = 5;
params.base_sup = 7.5
params.height = 25
etc. Doing this creates one convenient variable to pass around, but with the advantage of clear labeling of what each value means.
PR
2015-2-28
Image Analyst
2015-2-28
I tagged it as homework for you.
回答（1 个）
Rick Rosson
2015-2-27
0 个投票
You could write a script that calls each of the functions one or more times in the desired sequence, passing the output of one function as the input to the other function.
3 个评论
PR
2015-2-28
Rick Rosson
2015-2-28
That's exactly what I am suggesting. Maybe you should try it before you simply reject it as inadequate.
PR
2015-3-1
类别
在 帮助中心 和 File Exchange 中查找有关 Variables 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
