# How Do I Properly Format my Bar Graph?

8 views (last 30 days)
Chloe McCarthy on 22 Jan 2022
Commented: Chunru on 23 Jan 2022
I am trying to plot 2 arrays using the bar() function. The plot successfully displays, but I am trying to change the format for readability.
The following is the code I currently have:
% Clean
close all
clear
clc
format short
dataPoints = 1000;
bars = 4;
data = generateData(dataPoints); % Generrate and store data
sortedData = sort(data); % Sort data in ascending order
[xData , yData] = sortedPlotData(sortedData,bars); % Obtain plotting data
figure
bar(xData,yData)
title('Unnamed Project Title')
xlabel('Number in the Thousands (ie 4,000)')
ylabel('Percent')
xtickformat('%.4f')
ytickformat('percentage')
Because I want help in formatting the plot, I'll ommit the functions, but the plot that comes out is:
First note the x data points are [379.5 , 1138.3 , 1897.2 , 2656] and I have no problem with the y-axis. I am trying to format the x-axis so that the ticks are in decimal form (not scientific), and that there is 1 tick per bar. A good example of what I'm trying to explain comes from the documentation center:
Any assistance in helping me format my x-axis is greatly appreciated!

VBBV on 22 Jan 2022
Edited: VBBV on 22 Jan 2022
x = [379.5 , 1138.3 , 1897.2 , 2656]; % your values
y = rand(size(x));
bar(x, y)
xlabel('Number in the Thousands (ie 4,000)')
ylabel('Percent')
xticks(x); % use xticks same in count with your xvalues
xtickformat('%.1e')
You can use xticks to specify the x-values as an array which aligns with bars
Chloe McCarthy on 22 Jan 2022
This got me closer! This his how I modified my code:
% Clean
close all
clear
clc
dataPoints = 1000;
bars = 4;
data = generateData(dataPoints); % Generrate and store data
sortedData = sort(data); % Sort data in ascending order
[xData , yData] = sortedPlotData(sortedData,bars); % Obtain plotting data
figure
bar(xData,yData)
title('Unnamed Project Title')
xlabel('Number in the Thousands (ie 4,000)')
ylabel('Percent')
xticks(xData)
xtickformat('%.1e')
ytickformat('percentage')
And the result:
Now the main concern I have from here is converting 3.2*10^-1 x10^4 to 320, 1.6*10^0 x10^4 to 1,600, and so on.
EDIT: Just to give a clearer idea on what's stored in xData:
disp(xData)
1.0e+04 *
0.3218 0.9647 1.6077 2.2506

Chunru on 22 Jan 2022
Edited: Chunru on 22 Jan 2022
x = [10 30 36.7 50]*1e9;
y = rand(size(x))*30;
bar(x, y);
ax = gca;
ax.XTick = x;
ax.XAxis.Exponent = 9;
##### 2 CommentsShowHide 1 older comment
Chunru on 23 Jan 2022
ax.XTick = xData;
ax.XAxis.Exponent = 0;

R2021a

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