how to differentiate a function and then evaluate at a predefined variable?
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If i wanted to differentiate f=x*y with respect to y and then evaluate at a value y = 6 say. how would i do this? i would write the code syms y f=x*y g=diff(f) but then how would i go about the evaluation because it seems y is now fixed as a symbol. Also, i have this as predefined input values x,y so i would like to use the y value predefined as i'm writing it in a function
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madhan ravi
2018-11-6
syms x y
f=x*y
A=diff(f,y)
subs(A,y,6)
3 个评论
madhan ravi
2018-11-6
If you differentiate f with respect to y the result is x !
madhan ravi
2018-11-6
Anytime :) , I understood that you needed an example to know the functions , Happy Matlab(ing)
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