The change is part of the “DPI aware” nature of release R2015b. It does not appear as a formal bug, but technical support is aware of the problem. I reported the above issues to the Mathworks several months ago. Screen calibration deals with this problem, but this option is no longer available. A common complaint I get is that text and control labels is too small to easily read. Displaying accurately sized graphics is very difficult in R2015b, which is unfortunate given the many enhancements in this release.ĭevelopers who create graphical interfaces for other users should also care about this change. Figures are often made as small as possible to and densely packed to save journal space, and accurate sized display helps the author determine legibility. With a calibrated screen, figure appear exactly as they will when printed to a file (usually EPS or PDF). Scientific and engineering journals are extremly strict about figure widths. The loss of ScreenPixelsPerInch as an adjustable setting strongly affects anyone using Matlab for publication graphics. Matlab assumes that Macs use 72 DPI (96 DPI on Windows), so graphics appear at 65% of the request size. These examples were rendered on ~110 DPI display. The grid behind the figures was rendered at 8.5″ x 8.5″ inches on my display if your browser’s zoom level isn’t 100%, it may appear larger or smaller.Ī side effect of improper graphic sizing is that text is difficult to read - the uncalibrated axes labels are clearly smaller than 10 points. Differences between the two outputs are shown in the screenshot at the top of this post. Now renders differently in R2015b than does for a calibrated display in R2015a. Set(gcf, 'MenuBar','none', 'ToolBar','none', 'DockControls','off', 'NumberTitle','off') Īxes('FontUnits','points', 'FontSize',10) Set ( gcf, 'MenuBar', 'none', 'ToolBar', 'none', 'DockControls', 'off', 'NumberTitle', 'off' ) Īxes ( 'FontUnits', 'points', 'FontSize', 10 ) įigure('Units','inches', 'PaperPositionMode','auto', 'Position',) Determine the width of the figure in pixels:įigure ( 'Units', 'inches', 'PaperPositionMode', 'auto', 'Position', ).I often use a piece of US letter paper as 8.5″ guide on the display. Manually resize the figure to match a convenient width.There are tools for doing this at Matlab Central, but it’s not hard to do manually: If you really care about physical sizing, the best approach is to actually calibrate your display. Unfortunately these methods are not always reliable. It may be available in the hardware specifications, and it can be calculated from the diagonal size and the number of pixels. There are several ways to determine the correct DPI setting for a particular display. Retina displays are supposed to be >300 DPI, but I have not been able to test that myself. Set(groot,'ScreenPixelsPerInch',DPI) % R2014b through R2015aĭPI values tend to be higher for laptops, usually in the 120-130 range. Set(0, 'ScreenPixelsPerInch',DPI) % all releases prior to R2015b DPI = 110 % dots per inch for my 27" Apple Cinema Display set ( 0, 'ScreenPixelsPerInch',DPI ) % all releases prior to R2015b set (groot, 'ScreenPixelsPerInch',DPI ) % R2014b through R2015aĭPI = 110 % dots per inch for my 27" Apple Cinema Display
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