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Question: procedure with if statement

Question:procedure with if statement

mehdi jafari 774 Maple
proc heaviside
October 29 2019
1

I have a question with a proc containing "if" statement. 
i want maple to do the calculations without just like Heaviside function does. how can it be done?is it possible?

> 

restart
> 

f1:=proc(x)
if x>=0 then 1
else 0
fi:end proc:
> 

Matrix(2,[[f1(x)+2,2*f1(x)],[5,4]]);

Error, (in f1) cannot determine if this expression is true or false: 0 <= x

  
> 

P:=f1(x)*exp(x)+5*x;

Error, (in f1) cannot determine if this expression is true or false: 0 <= x

  
> 

diff(P,x)

0

 (1)
> 

 

> 

 


but i can do all of the above with Heaviside(x). can i do the same with my procedure?

Download if.mw
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