# My method for remembering which are X or Y co-ordinates

Unless you are doing this all the time, then remembering which are the X and Y co-ordinates (at a thought) can sometimes be difficult to remember and possibly mixed up.

I always remember in this way:

X is a cross (which undoubtedly it is). Therefore “X is across”. Simple.

I’m not saying that this hasn’t been thought of before, but it’s a useful thing to remember.

Cheers.

X = Value from the Left (0 to )
Y = Value from the Top (0 to )

and I do not talked about margin(s)

Excepted in PostScipt where (last time I checked) X is the same (value from the left 0 thru ), but Y is not:

Y is the value from the bottom (0) to the paper top (max value, depends on the choosed paper size in Page Setup).

[quote=399350:@Emile Schwarz]X = Value from the Left (0 to )
Y = Value from the Top (0 to )

and I do not talked about margin(s)

Excepted in PostScipt where (last time I checked) X is the same (value from the left 0 thru ), but Y is not:

Y is the value from the bottom (0) to the paper top (max value, depends on the choosed paper size in Page Setup).[/quote]

Cocoa does this too. Imagine putting the screen on a cartesian coordinate plane. Bottom left at 0,0 is the only thing that makes sense when you think about it this way. Still, my mind always thinks like a screen, so top left is 0,0 in my head.

Appreciated, but you guys missed the point My method does not require too much thought. Creating a “visual” image of X at least reminds us of the difference.

Why is Y?, hmmm…

If I was me then the bottom left hand corner would be 0,0

Which one is x or y and from where they start and to where they go is simply a matter of definition - there is no right or wrong way per se, and teaching otherwise makes it just much harder to deal with environments where those definitions are not the correct ones to use.

Assuming one or the other is a recipe for failure. After all, Assumption is the mother of all FUs 

P.S. Example of a student who got totally befuddled when the axis wasnt called x but time

I agree, well I guess time could be considered as “moving along” from left to right but that is just a construct of your learning.

Some cultures read text the other way, ie. from right to left, others accept that turning off a switch is UP!! others insist DOWN means OFF. Drive on the left side of the road - or the right… pure anarchy

I think it was Aldus Freehand that had the 0,0 point at bottom left (correct in my view of a drawing program). I’m not really sure if it was them, but that concept agrees with me.