how to find non zero maximum points(y_max with corresponding non zero x axis points ) of a plotted graph

i have wrote a script to plot some graph but now i wanted to mark or create a table with non -zero maximum points of each segments from the graph ( y_max with corresponding non zero x axis points).how can i write code that it will omit the zero x axis points and take the ymax with non zeo x axis point .(basically i dont need the max y points at o th point)

[Mathieu NOE]

hello

assuming x and y are the data, do the peak finding of y(x>0)

Answer 1

[Abhishek Chakram]

Hi Linta Joseph,

It is my understanding that you are facing difficulty in getting the values of y where the corresponding x>0. Here is a sample code for the same:

x = [0 1 2 3 4 5 6 7 8 9 10];
y1 = [75 91 105 123.5 131 150 179 203 226 249 281.5];
y2 = [12 32 34 1 31 10 19 23 236 945 678];
y3 = [32 65 456 12 11 15 17 545 546 457 657];
% Enable hold on to plot multiple bar graphs in one graph
hold on; 
bar(x, y1, 'b');
bar(x, y2, 'r');
bar(x, y3, 'g');
hold off;
% Get the values where x>0
y11 = y1(x>0);
y22 = y2(x>0);
y33 = y3(x>0);

% Find the maximum value of index-wise elements
segment_max = max([y11; y22; y33], [], 1)

In this example, the y values are extracted where x>0. The segment_max contains the ymax for each segment.

Best Regards,

Abhishek Chakram