How to generate specific number bar graph
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Ravi Kumar Poluru
on 5 Mar 2018
Commented: Pawel Jastrzebski
on 21 Mar 2018
Hello Sir, I have generated bar graph with 20 columns. But i need to generate specific number example i want to generate 15th column of bar graph.
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Accepted Answer
Pawel Jastrzebski
on 5 Mar 2018
Hello Ravi,
If you just want to select a specific bar out of your data set, then consider the code below. But you really need to be more descriptive as it's difficult to tell what is it that you want to achieve.
% generate random data set between 1 and 20
data = randi(20,1,20);
x = 1:20;
% plot the 'data'
figure
bar(x, data)
set(gca,...
'xTick', x)
% select one specific column
specificColumn = randi(20)
% first way - just plot the selected bar
figure
bar(data(specificColumn));
% second way - plot the selected bar in its place
% using logical vector
vector = false(1,length(data));
vector(specificColumn) = true;
dataChanged = data;
dataChanged(~vector) = 0;
figure
bar(dataChanged)
set(gca,...
'xTick', x)
% 3rd way - highlight the selected bar
% As in:
% https://uk.mathworks.com/help/matlab/ref/bar.html?s_tid=doc_ta#d119e63716
figure
b = bar(data);
b.FaceColor = 'flat';
b.CData(specificColumn,:) = [1 0 0];
set(gca,...
'xTick', x)
4 Comments
Pawel Jastrzebski
on 21 Mar 2018
OK, but this wasn't part of your question. You asked about the way to show a specific bar from the bar chart. I used random function to quickly simulate the user's choice.
What is your code for the 'input'?
This should work:
specificColumn = input('Selecy column:')
However, the 'input' can be anything so if user inputs i.e. char, the rest of the code will fail. You'll need to put some validation in place to make sure that checks if the outcome of the 'input' is an integer - if not, use loop to re-ask for the input.
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