I process data and I would like to know how to express min and max values of a group of data with horizontal and vertical lines as see in red in the Graph exemple.
Thank you
helene
MATLAB: How to process min and max data on a graph
grpahmaxmin
Related Solutions
Divide your data by half their maximum value and subtract 1 to get your data in the range [-1:1].
Or divide your data by their maximum value and multiply by 10 to get your data in the range [0:10].
Best wishes
Torsten.
This will do it:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;format compact;fontSize = 20;s = load('data.mat')data = s.data;hFig = figure;plot(data, 'b-', 'LineWidth', 2)grid on;xlabel('Index', 'FontSize', fontSize);ylabel('Signal', 'FontSize', fontSize);% Maximizxe the window.
hFig.WindowState = 'maximized';% Find the max
[maxValue, indexOfMax] = max(data)% Find the min
[minValue, indexOfMin] = min(data)% Find out where the signal last crosses 0 before the peak
% First set after the peak to infinity so we do not find that.
tempSignal = data;tempSignal(indexOfMax:end) = inf;indexLeft = find(tempSignal < 0, 1, 'last')% Plot a red spot there.
hold on;plot(indexLeft, data(indexLeft), 'r.', 'MarkerSize', 40);% Find out where the signal first crosses 0 after the max peak on the right side.
% First set before the valley to infinity so we do not find the peak.
tempSignal = data;tempSignal(1 : indexOfMax) = inf;indexMiddle = find(tempSignal < 0, 1, 'first')% Plot a red spot there.hold on;plot(indexMiddle, data(indexMiddle), 'r.', 'MarkerSize', 40);% Find out where the signal first crosses 0 after the min peak (the biggest valley).
% First set before the valley to -infinity so we do not find the peak.
tempSignal = data;tempSignal(1 : indexOfMin) = -inf;indexRight = find(tempSignal > 0, 1, 'first')% Plot a red spot there.hold on;plot(indexRight, data(indexRight), 'r.', 'MarkerSize', 40);
Best Answer