How to plot contours for a sparse data set?
Posted: Fri Jun 06, 2025 9:36 am
I am using the TContourPlot to show some data for which I have only 55 data points (data is inclued at the end of this post). On the plot below, I additionally draw small grey circles where my data points are located (i.e on a triangular pattern).
The plot I am expecting to get is as follows:
(I created this in Excel but had to interpolate between the data points, adding an extra point between every four circles)
However, I cannot get TChart to produce any contours for this data set.
Are there any settings within TChart that I can use to produce contours for this set?
Any suggestions would be most welcome!
Andrew
The data I have is as follows:
The data used to produce the plot on Excel is:
- PileGroup.jpg (39.77 KiB) Viewed 208 times
- Expected contours.jpg (50.12 KiB) Viewed 208 times
However, I cannot get TChart to produce any contours for this data set.
Are there any settings within TChart that I can use to produce contours for this set?
Any suggestions would be most welcome!
Andrew
The data I have is as follows:
Code: Select all
Index X Y Z
0 -8 192.4 0
1 8 192.4 0
2 2 195.3 -7
3 2 195.3 7
4 -2 195.3 -7
5 -2 195.3 7
6 -5 197.7 5.25
7 5 197.7 -5.25
8 5 197.7 5.25
9 -5 197.7 -5.25
10 7 200.4 1.75
11 -7 200.4 1.75
12 -7 200.4 -1.75
13 7 200.4 -1.75
14 -6 202.2 -3.5
15 6 202.2 -3.5
16 6 202.2 3.5
17 -6 202.2 3.5
18 -3 209.4 -5.25
19 3 209.4 5.25
20 -3 209.4 5.25
21 3 209.4 -5.25
22 -6 213.1 0
23 6 213.1 0
24 1 215 5.25
25 1 215 -5.25
26 -1 215 5.25
27 -1 215 -5.25
28 4 217.5 -3.5
29 4 217.5 3.5
30 -4 217.5 -3.5
31 -4 217.5 3.5
32 5 218.7 1.75
33 -5 218.7 -1.75
34 -5 218.7 1.75
35 5 218.7 -1.75
36 2 226.5 3.5
37 -2 226.5 -3.5
38 2 226.5 -3.5
39 -2 226.5 3.5
40 4 228.2 0
41 -4 228.2 0
42 0 229.4 3.5
43 0 229.4 -3.5
44 3 230.8 -1.75
45 -3 230.8 -1.75
46 3 230.8 1.75
47 -3 230.8 1.75
48 -1 236.8 1.75
49 1 236.8 1.75
50 1 236.8 -1.75
51 -1 236.8 -1.75
52 2 237.3 0
53 -2 237.3 0
54 0 240.3 0The data used to produce the plot on Excel is:
Code: Select all
x y z
-8 189.6 0
-7 197.5 -1.75
-7 198.65 0
-7 197.5 1.75
-6 199.2 -3.5
-6 205.55 -1.75
-6 210 0
-6 205.55 1.75
-6 199.2 3.5
-5 194.8 -5.25
-5 205.95 -3.5
-5 215.5 -1.75
-5 216.475 0
-5 215.5 1.75
-5 205.95 3.5
-5 194.8 5.25
-4 205.1333333 -5.25
-4 214.3 -3.5
-4 220.525 -1.75
-4 224.9 0
-4 220.525 1.75
-4 214.3 3.5
-4 205.1333333 5.25
-3 206.3 -5.25
-3 217.8 -3.5
-3 227.4 -1.75
-3 228.375 0
-3 227.4 1.75
-3 217.8 3.5
-3 206.3 5.25
-2 192.4 -7
-2 208.45 -5.25
-2 223.2 -3.5
-2 229.45 -1.75
-2 233.8 0
-2 229.45 1.75
-2 223.2 3.5
-2 208.45 5.25
-2 192.4 7
-1 211.9 -5.25
-1 223.625 -3.5
-1 233.4 -1.75
-1 234.35 0
-1 233.4 1.75
-1 223.625 3.5
-1 211.9 5.25
0 216.6 -5.25
0 226 -3.5
0 232.4 -1.75
0 236.8 0
0 232.4 1.75
0 226 3.5
0 216.6 5.25
1 211.9 -5.25
1 223.625 -3.5
1 233.4 -1.75
1 234.35 0
1 233.4 1.75
1 223.625 3.5
1 211.9 5.25
2 192.4 -7
2 208.45 -5.25
2 223.2 -3.5
2 229.45 -1.75
2 233.8 0
2 229.45 1.75
2 223.2 3.5
2 208.45 5.25
2 192.4 7
3 206.3 -5.25
3 217.8 -3.5
3 227.4 -1.75
3 228.375 0
3 227.4 1.75
3 217.8 3.5
3 206.3 5.25
4 205.1333333 -5.25
4 214.3 -3.5
4 220.525 -1.75
4 224.9 0
4 220.525 1.75
4 214.3 3.5
4 205.1333333 5.25
5 194.8 -5.25
5 205.95 -3.5
5 215.5 -1.75
5 216.475 0
5 215.5 1.75
5 205.95 3.5
5 194.8 5.25
6 199.2 -3.5
6 205.55 -1.75
6 210 0
6 205.55 1.75
6 199.2 3.5
7 197.5 -1.75
7 198.65 0
7 197.5 1.75
8 189.6 0