How to plot high resolution?

I would like to plot a histogram with 2048 bins. Is it possible plot and save it? pdf? retina display

[Jan]

What about simply trying it?

[Mr M.]

My problem is that I have retina display (2880x1800) but MATLAB cannot use it. The biggest plot window is 1440x900px (this is the fullscreen).

[Jan]

@Mr. M: Please insert this important information on top of your question: You are using a Mac with Retina display.

Answer 1

[Akira Agata]

How about adjusting a resolution by setting 'Position' property of figure. Here is an example.

% Sample data
mu = 0.0;
sigma = 1.0;
x = normrnd(mu,sigma,100000,1);

% Plot histogram with 2048 bins in full HD (1920x1080) resolution
figure('Position',[0 0 1920 1080])
histogram(x,'NumBins',2048)

[Mr M.]

Fisrt, my retina resolution is greater (2880x1800), however there is a problem with any resolution less than 2048 because of information loss. I need at least one pixel column for each bar on the histogram!

[Akira Agata]

OK. Then, how about saving your histogram as a high-resolution image?

mu = 0.0;
sigma = 1.0;
x = normrnd(mu,sigma,100000,1);

dpi = 150;            % Resolution
sz = [0 0 2880 1800]; % Image size in pixels

% Plot histogram with 2048 bins 
% and save as an .tiff image file 
% with 2880x1800 pixel and 150 dpi
figure(...
  'PaperUnits','inches',...
  'PaperPosition', sz/dpi,...
  'PaperPositionMode','manual',...
  'Visible',  'off')
histogram(x,'NumBins',2048)

print('-r150','-dtiff','histogram.tiff');

Answer 2

[Mr M.]

Could anyone solve this question?

[Walter Roberson]

Could you expand on how you are testing? I have a 2560 x 1440 mac display, and it is not obvious that it is losing information if I put up a plot with InnerPosition set to full screen. I think I might be seeing some aliasing though.

[Mr M.]

For example this: set(gcf,'unit','pixel','position',[0 0 1600 1200]); fullfills the screen. And the saved .png size is also low.

[Walter Roberson]

See https://www.mathworks.com/help/matlab/creating_guis/dpi-aware-behavior-in-matlab.html

[Mr M.]

This is not a rendering problem what I am talking about! this is a resolution setting problem! Once more: set(gcf,'unit','pixel','position',[0 0 1600 1200]); fullfills the screen!!

[Walter Roberson]

The reason that set(gcf,'unit','pixel','position',[0 0 1600 1200]) fills the screen is that for Retina displays, MATLAB arbitrarily declares that a "pixel" is to be 1/72 of an inch (which just happens to be the same as a "point") -- as described at https://www.mathworks.com/help/matlab/creating_guis/dpi-aware-behavior-in-matlab.html#buyrn8d

"Units Property

When you set the Units property of a graphics or UI object to 'pixels', the size of each pixel is now device-independent on Windows and Macintosh systems:

• On Windows systems, 1 pixel = 1/96 inch.
• On Macintosh systems, 1 pixel = 1/72 inch."

The full hardware resolution is still there and you can still put up images at the full hardware resolution: you just have to be careful about specifying sizes in units of Pixel. For example, you could:

set(gcf,'unit','norm','position',[0 0 1 1])