Creating a plot with 2 x -axis

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asd ad 2020-8-16

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https://ww2.mathworks.cn/matlabcentral/answers/580338-creating-a-plot-with-2-x-axis

评论： asd ad 2020-8-16

Raw data.xlsx

Hello everyone,

I would like to create a bar or a line plot with two x-axes from the xlsx file attached to this question. How do I do this? I would like the droplet size to be on the bottom x-axis and the distance to be on the top x-axis with the frequency on the y-axis. What is the easy way to do this?

Thanks

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回答（1 个）

Sara Boznik 2020-8-16

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https://ww2.mathworks.cn/matlabcentral/answers/580338-creating-a-plot-with-2-x-axis#answer_480693

Read about plotyy.

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Sara Boznik 2020-8-16

在 MATLAB Online 中打开

AX=plotyy(DropletSizemicrons,Frequency,'-b.','Markersize',25)    
xlabel('Droplet size [microns]')
set ( gca, 'xdir', 'reverse' )
set(AX(2),'XAxisLocation','Top')
ylabel('Frequency')

I get error with Unrecognized function or variable 'DropletSizemicrons'.

asd ad 2020-8-16

Error in plotyy>fevalfun (line 376)

h = feval(func,x,y);

Error in plotyy (line 78)

[h1,ax(1)] = fevalfun(fun1,ax(1),x1,y1,caxspecified);

Error in Untitled4 (line 25)

AX= plotyy(DropletSizemicrons,Frequency,'-b.','Markersize',25);

I get this error. DropletSizemicrons is the first column in the excel sheet which I imported using the import data function and then converted into column vectors. Apparently, it's an error in the plotyy function

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