How Do I Properly Format my Bar Graph?

Question

Chloe McCarthy 2022-1-22

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https://ww2.mathworks.cn/matlabcentral/answers/1633775-how-do-i-properly-format-my-bar-graph

评论： Chunru 2022-1-23

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!

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Answer 1

VBBV 2022-1-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1633775-how-do-i-properly-format-my-bar-graph#answer_879430

编辑：VBBV 2022-1-22

在 MATLAB Online 中打开

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

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Chloe McCarthy 2022-1-22

编辑：Chloe McCarthy 2022-1-22

在 MATLAB Online 中打开

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

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Answer 2

Chunru 2022-1-22

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1633775-how-do-i-properly-format-my-bar-graph#answer_879410

编辑：Chunru 2022-1-22

在 MATLAB Online 中打开

How about this?

x = [10 30 36.7 50]*1e9;

y = rand(size(x))*30;

bar(x, y);

ax = gca;

ax.XTick = x;

ax.XAxis.Exponent = 9;

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Chloe McCarthy 2022-1-22

在 MATLAB Online 中打开

This is how I modified the 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')

ax = gca;

ax.XTick = x;

ax.XAxis.Exponent = 9;

ytickformat('percentage')

And unfortunately this is the result:

I also received the error:

Unrecognized function or variable 'x'.

Error in main (line 19)

ax.XTick = x;

I feel I was dishonest in the exact data stored in xData so I'll past exactly what's stored here using disp (numbers change, but this will show the general format):

disp(xData)

1.0e+04 *

0.4429 1.3286 2.2142 3.0999

Chunru 2022-1-23

在 MATLAB Online 中打开

What you need to adapt:

ax.XTick = xData;
ax.XAxis.Exponent = 0;

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