DPlot

Thanks for your quick reply!

Your solution (Operate on X and Operate on Y) worked just fine.

Could this behavior be made into a 'check box' option on the 'Polar Options' dialog though?

Since negative distance is not permitted in polar coordinates, the convention is to interpret it as a positive ...

Hello,

I ran into a situation where I have a polar equation which can generate negative radius (Y) values for some ranges of angle (X).

Can you add an option on the Linear/Log Scaling | L. Polar Coordinates | Polar Options dialog to "Force Positive Radial Values" (or some such name) which will ...

David,

I tried to reproduce the crash with several of the same data files I plotted during development of 'split' but have not been able to recreate it.
I'm can't remember if I used the first split.dll before I downloaded the 2nd version. Maybe the crash occurred with the first version of the dll ...

David, thanks for advice on how to do this!

Please note that my initial post shows incorrect equation for Z:
Z = 1+2.0*sin(75*t).

The equation accompanying David's reply with my example plot has the correct equation:

Z = t+2.0*sin(75*t)

Also, once the data is imported from Excel, there are a few ...

Yes, I see the same cutoff help text for the "Split at Y=" (and I too am using WinXP). I also was able to crash DPlot (in the form of silent close of application) by selecting one of my two curves generated from recorded data.

However, the main item I wanted to mention is that the newly generated ...

I just discovered that when a note is newly created it may be hidden by the legend box if the latter is located in the upper-left corner of the graph window.

Even though I now know to look there, it still requires dragging away the legend box in order to grab the note to move it to the desired ...

I tested your method and got the desired result - illusion of a single curve which cleanly makes the color transition(s) with no artifact lines (the false condition value plotted as a 'flatline')

Regarding your to-do list, do you mean providing what essentially would be a 'lift-pen' command string ...

Here's a suggestion for a new feature: Provide ability to define a Y-value threshold for a curve below which one color is plotted and above which another color is plotted.

A colleague of mine for whom I generated 2D curves X, Y1, Y2, and (Y1-Y2) wanted to more clearly see when the derived curve ...

Duh! (I slap my own head)

Sorry I didn't read your earlier posting closely enough.
When you wrote, "Options>Extents/Intervals/Size your Z extents", my mind was still focused on Options>Contour Options.../Input values/upper and lower interval limits.

Thanks for your patience.

Ray Delaforce

Do you have any plans to extend 3D capabilities to allow representing 3D parametric equations?

Also, like 2D polar coordinates, in conjunction with 3D it would be nice to be able to represent equations in cylindrical or spherical coordinates.

Check out the following website for capability I'd like ...

I've sent a zipped file containing the .grf file and the .set configuration file I used.

Ray Delaforce

Hello,

I just noticed in the latest version (2.2.9.4) that when one attempts to either Center or Right justify text in a VERTICALLY oriented note box that the text will get redrawn outside of the box area. (I confirmed that justification works in a horizontally oriented note box).

Ray Delaforce

Hello,

I'm running the latest version (2.2.9.4) of DPlot.
I imported a 3-column CSV formated file (X,Y,Z) ["K" Type File] and discovered that the contour color is not working properly for the z-levels in the data.

If needed I can e-mail the large (~6MB) CSV file, but here is a short summary of X,Y ...

OK, I updated my e-mail address. You've had my proper address for update notices so it didn't occur to me that the forum profile held a separate one.
(That shows how long since I last used this forum).

For suggestions.

1.) What about compromise of using planes x=0, y=0, and z=0 and perhaps have a ...

Hello.

While doing some math exercises out of a book, I got a chance to use the 3D ability of DPlot (nice to be able to do rotations with CTRL-arrow keys!)

I noticed that the axes are drawn as "far walls (3 faces) of a 1/2 cube" which are oriented such that the extent of the 3D object fits inside ...

Whoops- When I looked at the help and briefly scanned the list of available functions, I must have unconsciously breezed past "rnd(x)" thinking it meant "ROUND"

Thanks again!

Hello David,

I would like to use DPlot to create a graphic file to imbed in a document which illustrates a digitally sampled "noisy" sinewave. However, I noticed that DPlot does not provide a "random" function. Can you add this function?


Thanks,

Ray D.

I guess I should get familiar with the macro commands. My request in another post to have DPlot window "stay on top" was already in your macro list!

Ray D.

8) I like the $X and $Y thing!
Now that I have 20/20 hindsight, I did some searching for these in Help but they did not show up -- What other "hidden" format specifiers do you have available? I could use one for "degrees" symbol.
Also, are there specifiers to designate decimal accuracy (or to place ...

David,

On the "File" pull-down menu, when one inadvertently selects a "most recent" DPlot file which is no longer available, could you provide an option to delete the shortcut link when the pop-up "Cannot Find this File" message appears?

(I guess I'm not patient enough to wait for (upto) 4 valid ...

David,

I am now using Add/Edit Note and Point Labels quite a bit and noticed that Notes are not saved with a custom setttings (.set) file.

In my application, I basically add the same 4-line note and change only the last line, dependending on my test data set. It would be nice to be able retain ...

David,

I've got a couple of suggestions to improve working with Polar Plots:

:idea: Point Labels:
Currently, only the magnitude value can be shown. It would be nice to have the magnitude/angle pair (angle in the selected radian or degree units) shown WITH the ability to add some small amount of ...

David,

I don't know why I just noticed it now, but I see that linked list information is not stored with the DPlot file. When I re-open a file, my links are gone. When saving a DPlot file, could you retain its existing link list information?

Maybe this creates the need to pop up a reminder dialog ...

David,

It would be a nice convenience feature to have the option of keeping DPlot's Window visible ("On Top") when I changing the focus to another application (Microsoft Excel, in my case).

This way, when working with linked data, one does not need to select (the now hidden) DPlot icon on the ...

OK, that did it.

Thanks Again.

Ray D.

You could start at 47 and go around the circle to 407 (and repeat as needed)

I missed the obvious. Thanks for pointing this out.

OK, so this isn't so bad for me (only 8 data points per curve). I could add an "if then" type check in my Excel angle cells to check its predecessor and adjust itself ...

Thanks.

Another improvement idea "hit me" while working some more with the Insert Link Dialog:

I just finished a sheet in Excel which I can use as a template for analysis sets of test data. I just copy and paste in another sheet in the same Excel file and enter the data for the new test.

In DDE ...

David,

I am using v1.9.2.2

The example I e-mailed to you has two labelled data points. One box with "0.21" whose data point is at about 100 degrees, and one box with "0.177" whose data point is at about 310 degrees.
When I drag EITHER point label box around, the arrow-lines of both point label ...

David,

I wanted to take the difference between two loosely circular enclosed Polar Chart regions ("curves") generated from discrete data points (linked from an Excel Spreadsheet). I got the following error:

[my comment in brackets]

"Any Y [magnitude] terms used in the equation must represent ...

David,

Thanks for the changes to DDE/Insert Links thus far.
However, I found that the Insert Link dialog's "Recently Used Links" list can get kind of "cluttered" fairly quickly when one is developing an Excel spreadsheet to use with DPlot for data analysis.

Suggestions:
1.) Add a "Remove" button ...