Creo relation in Mathcad.

[AndyHermanson]

I am wondering how i can write a Creo Relation in Mathcad 15.

In Creo the relation looks like this:

	IF MOD_WIDE == 4
		LEFT_BAY_MOD_WIDE = 2
	ELSE
		LEFT_BAY_MOD_WIDE = 3
	ENDIF

So when the variable MOD_WIDE is defined as 4, then the other variable LEFT_BAY_MOD_WIDE is set equal to 2, otherwise it is 3.

Any suggestions?

[Werner_E]

[ValeryOchkov]

Better so - for Mathcad 15, Prime and Express:

[Werner_E]

Any special reason for that preference other than that we would have to replace "otherwise" for "else" (or "elseif") in Prime?

Personally I prefer the programmed variant as I feel its a more clearly representation, especially when it comes to nested branches. But I think its a matter of peronal taste.

If shortness matters one could use in this case the following, but I wouldn't recommend it:

BTW it works, because in MC FALSE=0 and TRUE=1.

[AndyHermanson]

I am not getting either of these to work quite right. I think its the BOLD = sign. is not appearing that way on mine. Any suggestions? what might i be doing wrong.

The first one i got close but it wont assign the mod_wide := value into the next part.

[Werner_E · Accepted solution]

OK, Mathcad has a lot of equal signs with different meaning - you see three of them in both of my posts.

1) ":=" This is the assignment sign. You get it by simply typing ":" or you can use it from the evaluation toolbar

2) "=" The (bold) boolean equal sign; you use it to compare values; you get it by typing Ctrl&+ or take it from the Boolean toolbar

3) "=" the evaluation equal sign used to numerically evaluate the LHS; get it by typing the normal "=". There is a preference setting which results that when you type on the LHS a variable which is not defined and then the normal = you get a :=

I attach the worksheet for your convenience

[AndyHermanson]

Thank you so much. The "=" is actually shown as an arrow (Evaluate Symbolically) in the evaluation toolbar. Also i had forgotten to hit spacebar to grab the whole part to evaluate.

[Werner_E]

The symbolic evaluation (right arrow) is yet another of Mathcads equal signs but its not used in my examples. It has nothing to do with the boolean (bold) equal sign.

[AndyHermanson]

Really both say they use "ctrl +"? i r confused.

[Werner_E]

The shortcut for symbolic evaluation is Ctrl+.

In my german localized version the tool tip says that I get the fat boolean equal sign with Ctrl+=, but hats wrong, it's Ctrl++ on a german keyboard.

Anyway, just try and you will see immediatly if you get the right sign.