Trendline with Slope of zero
15 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Heather
el 21 de Feb. de 2019
Comentada: Heather
el 25 de Feb. de 2019
Hello,
I have a vector of raw lamp radiance data, and a vector of the moving standard deviation of that data. I want to add a trendline for the range of the standard deviation in which the slope is zero, in order to show when the lamp is stable. I have used polyfit to place the trendline to the graph, but it is not perfectly straight over the entire range of data. Is there a function in MATLAB that does this for me, or do I just have to keep adjusting which range of data I would like to look at manually?
0 comentarios
Respuesta aceptada
Image Analyst
el 23 de Feb. de 2019
A line with slope zero will have a fixed constant y value. If you know that y value, you can draw a line there with line():
line(xlim, [y, y], 'LineWidth', 2, 'Color', 'r');
grid on;
Attach your data if you want more help so we can offer a solution with your exact data.
8 comentarios
Image Analyst
el 24 de Feb. de 2019
What I would do it fit this to "the rate equation" and decide how far below the theoretical assymptote defines "stable" for you. I attach a rate equation fitting. See if you can adapt it to your data and determine when the assymptote is. It should be around 0.14835.
Más respuestas (0)
Ver también
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!