Matlab doesn't change MarkerSize
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Hi all,
I know this is a basic one, but for some reason when I plot a figure, certain markers don't change their Size. The code that I use is the following:
plot(datos(index,i+1),headers(1,i+1),'sk','MarkerSize',4,'LineWidth',.25,'MarkerFaceColor',[R G B]);
or
plot(datos(index,i+1),headers(1,i+1),'pk','MarkerSize',4.5,'LineWidth',.25,'MarkerFaceColor',[R G B]);
When I set the MarkerSize for a square or pentagram shape they always end up in a size 2.9x2.9 (squares) or size 4.2x4.06 (pentagram). I'm saving the figure as a PDF with "print(fig1,saveString,'-dpdf','-fillpage');" don't know if that matters but I thought of mentioning it.
Thanks in advanced,
Carlos TM
2 个评论
Walter Roberson
2018-6-3
Is the difficulty occurring even on the displayed images, or only in the PDF ?
Carlos Trasviña
2018-6-3
采纳的回答
The unit of 'MarkerSize' is 'points' which is typically 1/72 inch. Depending on your OS, there are usually 96 pixels per inch. If you do the math on various marker sizes - and assume that apparent size of a marker is floor of its pixel size - the following sheds a little light:
pts = 4:.1:5;
in = pts./72;
pix = in.*96;
[pts;in;pix]
ans =
4.0000 4.1000 4.2000 4.3000 4.4000 4.5000 4.6000 4.7000 4.8000 4.9000 5.0000
0.0556 0.0569 0.0583 0.0597 0.0611 0.0625 0.0639 0.0653 0.0667 0.0681 0.0694
5.3333 5.4667 5.6000 5.7333 5.8667 6.0000 6.1333 6.2667 6.4000 6.5333 6.6667
This would make me believe that 4.5 looks larger than 4.0-4.4, but it could be a little round-off error in MATLAB's calculation vs. my assumed algorithm above. Try 4.6 for your 'MarkerSize' and see if that helps.
3 个评论
Greg
2018-6-3
To be really sure, run a range of 'MarkerSize' inputs through a for loop and see where they look bigger:
for ij = 4:.1:5
figure('Name',sprintf('%.2f',ij));
plot(1:10,'sk','MarkerSize',ij);
end
Greg
2018-6-3
Thinking about it more, a ceil as opposed to floor of pixel size would explain it.
Carlos Trasviña
2018-6-3
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