Hi all,
Does anyone of you know how to calculate cdf plot using following data sets:
A = [10 10 10 5 3 3 3 2 0]; B = [10 10 10 5 5 3 3 2 2 2 1 0]; how can obtain cdf from A and B?
Best Regards Talha
MATLAB: Computing CDF???
cdf
Related Solutions
% Demo to plot histogram and cdf of grayscale image.
% By ImageAnalyst
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
imtool close all; % Close all imtool figures.
clear; % Erase all existing variables.
workspace; % Make sure the workspace panel is showing.
fontSize = 14;% Read in a standard MATLAB gray scale demo image.
folder = fullfile(matlabroot, '\toolbox\images\imdemos');baseFileName = 'cameraman.tif';fullFileName = fullfile(folder, baseFileName);% Get the full filename, with path prepended.
fullFileName = fullfile(folder, baseFileName);if ~exist(fullFileName, 'file') % Didn't find it there. Check the search path for it.
fullFileName = baseFileName; % No path this time.
if ~exist(fullFileName, 'file') % Still didn't find it. Alert user.
errorMessage = sprintf('Error: %s does not exist.', fullFileName); uiwait(warndlg(errorMessage)); return; endendgrayImage = imread(fullFileName);% Get the dimensions of the image. numberOfColorBands should be = 1.
[rows columns numberOfColorBands] = size(grayImage);% Display the original gray scale image.
subplot(2, 2, 1);imshow(grayImage, []);title('Grayscale Image', 'FontSize', fontSize);% Enlarge figure to full screen.
set(gcf, 'units','normalized','outerposition',[0 0 1 1]);set(gcf,'name','Demo by ImageAnalyst','numbertitle','off') % Let's compute and display the histogram.
[pixelCount grayLevels] = imhist(grayImage);subplot(2, 2, 2); bar(pixelCount);title('Histogram of image', 'FontSize', fontSize);xlim([0 grayLevels(end)]); % Scale x axis manually.
grid on;% Compute the CDF
cdf = cumsum(pixelCount) / numel(grayImage);% Plot both hist and cdf on same plot
subplot(2,2,3);bar(pixelCount);hold on;z = zeros(1,length(pixelCount));plotyy(grayLevels, z, grayLevels, cdf);title('Histogram and CDF of image', 'FontSize', fontSize);xlim([0 grayLevels(end)]); % Scale x axis manually.grid on;What you've put doesn't really make sense. See if this is what you want. It computes the histograms of x and y and then plots them.
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables.
workspace; % Make sure the workspace panel is showing.
fontSize = 15;x=rand(10,1); y=rand(10,1);% Plot the original x data.
subplot(2, 2, 1);bar(x);xlabel('Index of X', 'fontSize', fontSize);ylabel('Value of X', 'fontSize', fontSize);title('X as a function of Index', 'fontSize', fontSize);% Plot the original y data.
subplot(2, 2, 2);bar(y);xlabel('Index of Y', 'fontSize', fontSize);ylabel('Value of Y', 'fontSize', fontSize);title('Y as a function of Index', 'fontSize', fontSize);% Get the histograms.
[xCounts xValues] = hist(x)[yCounts yValues] = hist(y)% Plot X histogram.
subplot(2, 2, 3);bar(xValues, xCounts);xlabel('Value of X', 'fontSize', fontSize);ylabel('Frequency of Occurrence for X', 'fontSize', fontSize);grid on;title('Histogram of X', 'fontSize', fontSize);subplot(2, 2, 4);bar(yValues, yCounts);xlabel('Value of Y', 'fontSize', fontSize);ylabel('Frequency of Occurrence forY', 'fontSize', fontSize);grid on;title('Histogram of Y', 'fontSize', fontSize);% Enlarge figure to full screen.
set(gcf, 'Position', get(0,'Screensize'));
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