Found it really hard to export a high resolution .png while keeping the legends. Here is the code:

 Histogram[{data[[All, 2]], data[[All, 3]]}, 
  PlotLabel -> "Greenland & Antarctica mass frequency", 
  AxesLabel -> {"Mass(Gt)"}, 
  ChartLegends -> {"Greenland", "Antarctica"}], 
 ImageResolution -> 500]

And the exported image is like exported

How can I correctly format this and export?

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It seems the issue has to do with you using ImageResolution instead of ImageSize.

I didn't have your original data, so I fabricated some:

data = RandomInteger[{100, 1000}, 20]

Then ran similar code calling the fake data and using ImageSize->1000:

 Histogram[data, PlotLabel -> "Greenland & Antarctica mass frequency",
   AxesLabel -> {"Mass(Gt)"}, 
  ChartLegends -> {"Greenland", "Antarctica"}, ImageSize -> 1000]]

Here is what I came up with: enter image description here

If you want to change the text size you can do so with additional options.

  • $\begingroup$ Thanks for your reply. I have tried to use ImageSize, but the output image is kind of blurry, that's why I am using ImageResolution $\endgroup$ – Grox Ni Oct 25 '18 at 5:50
  • $\begingroup$ In my previous answer, I had incorrectly placed the ImageSize in the export parameters. In my corrected example, I placed in the Histogram paramaters yielding a better result. You can make the image as big as you want, but you need to change the parameters for the text (key, axes, label, etc.) to compensate. $\endgroup$ – kickert Oct 25 '18 at 19:35
  • $\begingroup$ I suggest export as PDF format, if you don't insist using PNG. $\endgroup$ – Okkes Dulgerci Oct 25 '18 at 19:37

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