How to plot data where one variable is represented by color intensity?

Data is of this type:

X=1:2204;
Y=[1995 1996 1997 1998 19990];
Z=[23 5 46 8 24 656 .........2204 values;
   ......................................;
   ......................................; 
   ......................................;
   .......................................]
X- represnts 2204 candidate, like candidate 1 candidate 2
Y- I have data of these candidate of five years
Z- each row representing data of one year.

I want to plot this data in five strips, where color intensity in any strip gives us value of z corresponding to that year.

Output should look like as shown in figure:

Answer 1

[Image Analyst]

Try this:

columns = length(Z);
rows= round(max(Y) - min(Y));
output = zeros(rows, columns);
for row = 1 : rows
    thisRow = y(row) - min(Y) + 1;
    for col = 1 : length(Z)
        output(thisRow, col) = z(col);
    end
end
imshow(output, []);
colormap(winter(256));

[Himanshu Tyagi]

Dear,

This is showing this warning: Warning: Image is too big to fit on screen; displaying at 50% > In imuitools\private\initSize at 72 In imshow at 283 In barchart at 17

and output is:

and It is not showing five strips. Please help me out.

[Image Analyst]

Well, give us some data to work with along with code to read it in. Keep in mind that the image will only be 5 pixels high unless you use imresize() to make it taller.

tallImage = imresize(output, [1000, 1000], 'nearest');
imshow(tallImage, []);

[Himanshu Tyagi]

[ndata, text, alldata]=xlsread('Y_for bar chart.xlsx');
alldat=(alldata)';
z=cell2mat(alldat);
x=1:2204;
y=1:5;

This is the data on which i am working on. Thanks in advance.

[Image Analyst]

[ndata, text, alldata]=xlsread('Y_for bar chart.xlsx');
allData = ndata';
[rows, columns] = size(allData)
resizedData = imresize(allData, [columns, columns], 'nearest');
imshow(resizedData, []);
axis on;
% Create and apply colormap.
colorMap = ones(256, 3);
colorMap(:, 1) = linspace(1, 0, 256);
colorMap(:, 2) = linspace(1, 0, 256);
colorMap(:, 3) = 1;
colormap(colorMap)
xlabel('Candidate');
ylabel('Year');
colorbar;