if...and...

[Bossebo]

Hi
I realy searched in mathcad help for this one but cant find it.

I would like mathcad to do this:

f(x)=a+b if a>0 and b>0

i know how to do it with just one condition but how do i get it to check both if a>0 and b>0 ??

 

[IRstuff]

Did you search for Boolean Operators?

TTFN

FAQ731-376

 

[Occupant]

I don't quite understand what you really want, but the attached should at least get you going, Of course, only the firt case really counts, I added the others to play through all possibilities.

 

[Bossebo]

Sorry but my english is quite bad.

I know how to do this:

f= a+b if a>0
a-b otherwise

witch in words meens that matchad check wether a is bigger than 0 and the set f=a+b. if a should happen to be smaler than 0 it set f to a-b.

Now i want mathcad to check wether both a and b is bigger than 0 and then set f=a+b otherwice f should be a-b.

I thought something like this would work:
f=a+b if a>0,b>0
a-b otherwise

but it dident. I simply want to write an if...and..then... formula

Do I make myself clear?

 

[IRstuff]

This is not a question of English, but of math, and you already wrote the form of the equation in your original posting:

if((a>0)^(b>0),a+b,"not valid")

TTFN

FAQ731-376

 

[jghrist]

f:=if((a>0)*(b>0),a+b,a-b)

 

[PNachtwey]

I have an example that shows how to use the 'and' or '^' operator

http://www.deltamotion.com/peter/Mathcad/Mathcad - t2p1 JCH cascade simple.pdf

see page 5/15.


Peter Nachtwey
Delta Computer Systems

http://www.deltamotion.com

 

[Bossebo]

Thanks everyone. I searched for boolean and found out how to do!