[brookhaven]

Greetings,

For some time I have been using OmniGraphSketcher, as I like the simplicity and the ability to export vector graphics to my other machine.

However, I do occasionally get 'kinks' in my curves and I wondered if there is any easy way to smooth these kinks out.

I generate the data in a spreadsheet and I have added an example data set below (inverse tan function).

I can smooth the curves to some extent by selecting the line type to 'straight' in the style inspector, but the curves really need to be smoothed curves by definition.

Increasing the number of data points does not necessarily improve matters either.

Have I missed something? Does the panel have any advice?

Many thanks.

-85 11.474
-80 5.759
-75 3.864
-70 2.924
-65 2.366
-60 2.000
-55 1.743
-50 1.556
-45 1.414
-40 1.305
-35 1.221
-30 1.155
-25 1.103
-20 1.064
-15 1.035
-10 1.015
-5 1.004
0 1.000
5 1.004
10 1.015
15 1.035
20 1.064
25 1.103
30 1.155
35 1.221
40 1.305
45 1.414
50 1.556
55 1.743
60 2.000
65 2.366
70 2.924
75 3.864
80 5.759
85 11.474

[dave_m]

Because it was originally designed for sketching graphs rather than plotting equations, OmniGraphSketcher always chooses the curve that mostly smoothly connects all points in a given line. Every curve algorithm necessarily makes assumptions about how to interpolate between each data point, and of course those assumptions may or may not be correct in a given situation.

I assume you're using another application to generate the points that you're pasting in to OmniGraphSketcher - the best option might be to increase the sampling until the OGS graph looks acceptable with straight segments connecting them.