Creating a plot with 2 x -axis

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

Answer 1

[Sara Boznik]

Read about plotyy.

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But I need two x-axis and not y-axis

[Sara Boznik]

AX = plotyy(...);
set(AX(2),'XAxisLocation','Top')

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num = xlsread("Raw data.xlsx") ; 
R = num(:,1) ;   % sizes 
x = linspace(0,1.18,length(R)) ; 
y = zeros(size(R)) ; 
R = R(end:-1:1) ; % Reverse R
subplot(2,1,1)
scatter(x,y,R,R,'filled','MarkerEdgeColor',[0 .5 .5],...
              'MarkerFaceColor',[0 .7 .7],...
              'LineWidth',1.5)
xlabel('Distance (m)')
xlh = xlabel('Distance (m)');
xlh.Position(2) = xlh.Position(2) - 1.0;  % move the label 0.1 data-units further down
axh = axes;
xlh = xlabel('Distance (m)');
xlh.Position(2) = xlh.Position(2) - abs(xlh.Position(2) * 0.1);
ylabel('Height (m)')
ylim([0 2]) 
hold on
scatter(0,1.7,3000,'filled','MarkerEdgeColor',[0 .5 .5],...
              'MarkerFaceColor',[0 .7 .7],...
              'LineWidth',1.5)
subplot (2,1,2)
plot(DropletSizemicrons,Frequency,'-b.','Markersize',25)    
xlabel('Droplet size [microns]')
set ( gca, 'xdir', 'reverse' )
AX = plotyy(...); 
set(AX(2),'XAxisLocation','Top')
ylabel('Frequency')

that's currently my code. I added the command you told in the second last line but it doesn't seem to be working when I run it

[Sara Boznik]

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'.

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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