Displaying an axis scale in mm rather than pixels
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Robbie McDermott
el 1 de Nov. de 2017
Comentada: elvis okacha
el 13 de Abr. de 2019
I have written a code for image analysis that uses the number of pixels throughout to calculate lengths. Now I want to plot graphs and have my axis reading in millimetres rather than number of pixels. I have a calibration factor calculated, is there a simple way I can have axis in millimetres. I need this code to work for multiple pictures therefore using the xticks and xticklabels method would help.
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Looky
el 1 de Nov. de 2017
Editada: Looky
el 1 de Nov. de 2017
It's a bit tricky without any example data, but this should do the trick.
conversion=0.1; % in mm/pixel
addMM=@(x) sprintf('%.3fmm',x*conversion);
xticklabels(cellfun(addMM,num2cell(xticks'),'UniformOutput',false));
yticklabels(cellfun(addMM,num2cell(yticks'),'UniformOutput',false));
You can fine tune how many digits are displayed by editing the '%.3fmm' in the second line(see formatSpec). Change the variable conversion to your needs. It's in mm per pixel. Hope that helps, if not, just ask. Note that Matlab still treats the axis in Pixel, but displays the converted mm. If you make changes to xtick and ytick, you have to call the above lines again.
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Stelios Fanourakis
el 9 de En. de 2019
It is a very nice solution, indeed. Thanks a lot as well. I'd like to ask whether there is a way to have more steps, like every 50 mm or every 10 mm, instead of almost a 100 mm
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elvis okacha
el 10 de Abr. de 2019
Look I'm trying to implement your solution within a button program in my guitar,but I still get error that 'undefined variable 'xticks''.allitle new to Matias.is there some additional code on the use of stick and xticklabels?kindly
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Walter Roberson
el 12 de Abr. de 2019
set() the axes XTickLabels and YTickLabels properties instead of calling xticklabels() and yticklabels()
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