# Tag: FastNonUniformHeatmapRenderableSeries

### Welcome to the SciChart Forums!

• Some reputation is required to post answers. Get up-voted to avoid the spam filter!
• We welcome community answers and upvotes. Every Q&A improves SciChart for everyone
5k views

I was looking at the example given at this link for NonUniformHeatmapDataSeries in SciChart. In this example, the width and height of heatmap is given as h=4 and w=7. As I understand h is for Y axis and w is for X axis and data[,] is for Z axis. However, the counts in actual data filled for these axis are not matching wight h and w.

``````var xRangeMapping = new int[] { 0, 10, 20, 26, 36, 60, 72, 84 };   // 8 points for w
var yRangeMapping = new int[] { 100, 250, 390, 410, 600 };         // 5 points for h
``````

What is the purpose of extra points added at first place (0 and 100)? Are these required to set the starting point for both axis?

Here is the code given at above link:

``````int w = 7, h = 4;
var data = new double[h, w];
double maxValue = double.MinValue;
for (int x = 0; x < w; x++)
for (int y = 0; y < h; y++)
{
data[y, x] = 3.5 * ((h - y) * (w - x));
maxValue = Math.Max(maxValue, data[y,x]);
}
var xRangeMapping = new int[] { 0, 10, 20, 26, 36, 60, 72, 84 };
var yRangeMapping = new int[] { 100, 250, 390, 410, 600 };
var heatmapDataSeries = NonUniformHeatmapDataSeries<int, int, double>(data, i => xRangeMapping[i], i => yRangeMapping[i]);

// Apply the Heatmap DataSeries to a FastNonUniformheatmapRenderableSeries
var heatmapRenderableSeries = new FastUniformHeatmapRenderableSeries()
{
ColorMap = new HeatmapColorPalette()
{
Maximum = maxValue,
Minimum = 0,
}
};
``````
• Anil Soman asked 5 years ago
• last active 5 years ago