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2-Guest

## Plotting a section of a sphere

Hello,

to plot a sphere.

I thought I had understood all the procedure, converting the spherical coordinates into cartesian and plotting.

However, i've try to plot only a section of them (i.e. half of it, or form theta = 0 to theta = 3*pi/4) and didn't work.

I've try change the start and end values of range.

Can anyone give a hint where to find this subject to study or what modifications I need to do to be able to plot this?

Thanks!

1 ACCEPTED SOLUTION

Accepted Solutions
20-Turquoise

This is from PTC Mathcad Education Worksheet Library.

Tokoro

4 REPLIES 4
24-Ruby V

Attach your worksheet here so we can see

- which version of Mathcad/Prime you are using

- what you have done so far

- were the problem could lie

While in the thread you are referring the function createmesh was not used because the OP for some reason did not want to use it, I would strongly advise that you use this function to create a mesh and then plot that mesh in the 3D plot.

Furthermore, if you are using Prime and not real Mathcad, you have to keep in mind that Prime is missing a lot of features and especially the 3D-plot capabilities in Prime are almost useless.

For the soon coming Prime 5 it was promised to include improved 2D-plot capabilities. Guess we would have to wait for Prime 6 or longer to get worthwhile 3D-plots.

2-Guest
(To:Werner_E)

Hi,

I tried to reproduce following the ttokoro's answer and my plots look like a single line.

The attach he sends it's almost what I need, I just need to close the regions, but I guess this could be done by plotting more than one surface at the same time.

Following the example, I found the CeateMesh syntax in Mc15 it's a little bit different and tried to change.

But now, just checking before sent this answer, one plot works and the other still being a line.

There's something to refresh the plot or I need to do something specific before each plot?

I found!

One plot has the autoscale option enabled while the other doesn't.

Thanks!

20-Turquoise