# How to remove space between bars in bar graph for unequally spaced data?

5 views (last 30 days)
Aditya Rai on 17 Apr 2021
Edited: the cyclist on 18 Apr 2021
Hi, I am creating an app using MATLAB App Designer. This app asks the user for a specific year and uses interpolation to predict what the population might be in that year. I have taken the population data from 1901 to 2011. However when I try to plot the bar graph due to the unequally spaced data which relies on the user input, I am getting white space between the bars. This is my code uptill now:
cla(app.UIAxes);
year = app.EnterYearEditField.Value;
if (year>=1901 && year<=2001)
x = 1901:10:2001;
y = [238396327, 252093390, 251321213, 278977238, 318660580, 361088090, 439234771, 548159652, 683329097, 846427039, 1028737436];
estimated_population = interp1(x,y,year,'spline');
x = [x year];
y = [y estimated_population];
[x,sortIndex] = sort(x,'ascend');
y = y(sortIndex);
bar(app.UIAxes,x,y,'BarWidth',1);
end
Before clicking the plot button:
After clicking the plot button:
How do I remove this unwanted whitespace between the graphs that I get after clicking the plot command?
Thanks.

the cyclist on 17 Apr 2021
To me, it seems like a bad idea to make the bars evenly spaced, if the data are not from evenly spaced years. If the x-axis represents time, surely the user expects each bar to be correctly placed in time. It is more important that a plot represents the data accurately, than be "pretty".
Instead, perhaps make the 1987 bar a different color, and be sure it is in front? I think that still looks good, and also faithfully represents the data.
Aditya Rai on 18 Apr 2021
Thanks for your response! This way of stacking the graph on top seems to be a better method. I will surely try this. I appreciate you taking the time out to respond. Thanks again!

R2018a

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