Sparkline

cvui::sparkline() renders the values of a std::vector<double> as a sparkline. The signature of the function is:

void sparkline (
    cv::Mat& theWhere,
    std::vector<double>& theValues,
    int theX,
    int theY,
    int theWidth,
    int theHeight,
    unsigned int theColor = 0x00FF00
)

where theWhere is the image/frame where the image will be rendered, theX is the position X, theY is the position Y, theWidth is the width of the sparkline, theHeight is the height of the sparkline, and theColor is the color of sparkline in the format 0xRRGGBB, e.g. 0xff0000 for red.

Below is an example showing a sparkline. The result on the screen is shown in Figure 1.

std::vector<double> values;
for (std::vector<double>::size_type i = 0; i < 30; i++) {
  values.push_back(rand() + 0.);
}

cvui::sparkline(frame, values, 10, 10, 280, 100);

Figure 1: sparkline component.

Learn more

Check the sparkline example for more information about sparklines.