How to write if else program on matlab?

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Drishya Dinesh
Drishya Dinesh 2020-3-19
编辑： Drishya Dinesh 2020-3-21
This is the program, but it is not working. My output is always 5. But why? How to correct it? It is written as a matlab function in simulink.
PROGRAM:
function betaref = fcn(w)
if (w<5)
betaref=45;
elseif (5<w<15)
betaref=5;
elseif (15<w<25)
betaref=0;
else
betaref=90;
end
  2 个评论
Drishya Dinesh
Drishya Dinesh 2020-3-19
编辑：Drishya Dinesh 2020-3-19
Thankyou for your reply!
This is my simulink diagram. My output should track betaref. My input is 25 which implies betaref should be zero. But i have 5 instead.

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回答（1 个）

Steven Lord
Steven Lord 2020-3-19
elseif (0<power<=1000)
This doesn't do what you think it does. If you're writing this code in the MATLAB Editor and you're using a relatively recent release you should have received a Code Analyzer warning alerting you to that fact (an orange line in the right scroll bar for the Editor window and orange underlines of part of this construct.)
Instead:
elseif (0<power & power<=1000)
  1 个评论
Drishya Dinesh
Drishya Dinesh 2020-3-19
Thankyou for your reply!
What if my program is like,
function betaref = fcn(w)
if (w<5)
betaref=45;
elseif (5<w<15)
betaref=5;
elseif (15<w<25)
betaref=0;
else
betaref=90;
end

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