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Need help reading 3-D

by Speedracer72
Tags: reading
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Speedracer72
#1
Feb11-12, 05:31 PM
P: 1
Ok, so I am having help knowing when x,y,z are positive or negative. My graph looks something similar to this..

-------------z---------x
-------y

---------------------y

---x

--------------z

I am really confused as to when a location in all 3 axes is negative or positive in all x,y,z.
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Travis_King
#2
Feb12-12, 09:04 AM
P: 841
Your diagram doesn't really explain what you are getting at. You might want to elaborate?
jim hardy
#3
Feb12-12, 09:52 AM
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P: 3,686
Well, i may not understand the question either.
See if this is on track -

it's the duty of the guy who's writing the book or article or drawing the chart to define his axes.

Let's start simple

IF you look at a map flat on your table,
most folks would agree East is positive direction in X,
and North is positive direction in Y,
and UP out of the map is positive direction in Z.

is that any help ??

berkeman
#4
Feb13-12, 05:05 PM
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Need help reading 3-D

Quote Quote by Speedracer72 View Post
Ok, so I am having help knowing when x,y,z are positive or negative. My graph looks something similar to this..

-------------z---------x
-------y

---------------------y

---x

--------------z

I am really confused as to when a location in all 3 axes is negative or positive in all x,y,z.
Welcome to the PF.

Maybe this is a better picture to start with. Can you use this picture to state your question a little more clearly?

http://www.mathworks.com/help/toolbo...coordinate.gif


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