Help Understanding 3D Coordinates

[Speedracer72]

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.

 

[Travis_King]

Your diagram doesn't really explain what you are getting at. You might want to elaborate?

 

[jim hardy]

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]

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/toolbox/phased/ug/rh_coordinate.gif
http://www.mathworks.com/help/toolbox/phased/ug/rh_coordinate.gif

 

[alphy]

Sure, I can help you understand 3D coordinates. In a 3D coordinate system, there are three axes - x, y, and z. The x-axis represents horizontal movement, the y-axis represents vertical movement, and the z-axis represents depth or distance from the viewer. In your graph, the x-axis is horizontal, the y-axis is vertical, and the z-axis is coming out of the page towards the reader.

To determine if a location is positive or negative in all three axes, you need to look at the signs of the numbers on each axis. If a number is positive, it means the point is located to the right of the origin (in the case of the x-axis), above the origin (in the case of the y-axis), or in front of the origin (in the case of the z-axis). If a number is negative, it means the point is located to the left of the origin (x-axis), below the origin (y-axis), or behind the origin (z-axis).

For example, if a point has coordinates (2,3,4), it means it is located 2 units to the right of the origin, 3 units above the origin, and 4 units in front of the origin. If a point has coordinates (-3,-1,-5), it means it is located 3 units to the left of the origin, 1 unit below the origin, and 5 units behind the origin.

I hope this helps you understand when a location is positive or negative in all three axes. If you have any other questions, please let me know.