I have a matlab plot(graph) x,y axis and i want to find the maximum from x axis. How to find that?
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a= [1 2 13 20 10 20 12 1 13 14]
b= [1:10:100]
plot(a,b)
I want to find the maximum('a') from the plot and then take the corresponding point let say 'a3,b3' and store it some where else and remove it from the plot. then I want to subtract 'a3' from every point left in 'a' and plot the graph. and I need to do this again till it reaches an thresh hold point.
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Image Analyst
2015년 5월 31일
Try this demo and see if it does what you want (plotting, finding, saving, and removing max, then subtracting max from what's left).
fontSize = 24;
a= [1 2 13 20 10 20 12 1 13 14];
b= [1:10:100];
storedMaxima = zeros(1, length(a));
loopCounter = 1; % For storing the maxima
hFig = figure;
while ~isempty(a)
% Plot what we have.
plot(b, a, 'b*-', 'MarkerSize', 19, 'LineWidth', 2);
grid on;
xlabel('b', 'FontSize', fontSize);
ylabel('a', 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0 0 1 1]);
% See if they want to quit now.
if length(a) > 1
promptMessage = sprintf('Do you want to Continue processing,\nor Quit?');
titleBarCaption = 'Continue?';
button = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
if strcmpi(button, 'Quit')
break;
end
end
% Find the max
[maxValue, indexOfMax] = max(a);
% Store the maxima
storedMaxima(loopCounter) = maxValue;
loopCounter = loopCounter + 1;
% Remove the max
a(indexOfMax) = [];
b(indexOfMax) = [];
% Subtract the max from a.
a = a - maxValue;
end
% Print maxima to command window:
storedMaxima
uiwait(helpdlg('Done with demo.'));
close(hFig); % Close down figure.
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Image Analyst
2015년 6월 1일
편집: Image Analyst
2015년 6월 1일
It looks like a different CLEAN algorithm than the famous one used in astronomy, but good luck with it. Let us know if you have any questions.
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