two data sets & two colorbars on same figure

Question

yonatan s 2018-1-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/379410-two-data-sets-two-colorbars-on-same-figure

评论： yonatan s 2018-1-29

topo.jpg

I have a figure representing a topographic map. after plotting it, i want to change the values within the circle for values ranging from 0 to 1 according to some criteria (variable zp in the code).

in the final figure i want to present both the topographic map and the map within the circle, but to use different colorbar for them.

so, a couple of questions:

1. the value within the circle is a scalar field, so how do i plot it?

2. how do i create a separate colorbar only for the data within the circle?

here's the code (unfortunately maps.mat is too big for uploading):

if ~exist('TOPO','var')
    load('maps.mat');
end
z=TOPO; ppd=512;
%z=TOPOels; ppd=128;
R=1737;
kmpd=2*pi*R/360;
res=kmpd/ppd;
r=7.5;
lat0=-38;
x=(1:size(z,2))*(res*cosd(lat0));x=x-mean(x);
y=(1:size(z,1))*(res); y=y-mean(y);
imagesc(x,y,z); axis tight ij equal; hold on;
plot(sin(th)*r,cos(th)*r,'-k'); hold on;
[yy,xx]=ndgrid(y,x);
th=linspace(0,2*pi);
d=sqrt(xx.^2+yy.^2)*1e3;
azbw=1;
azbins=-180:azbw:180;
f=find(d<r*1e3);
slaz=zeros(size(f)); 
% zzr=zeros(size(f));
for i=1:50 %length(f)
    xxr=xx-xx(f(i)); yyr=yy-yy(f(i));
    az=atan2d(yyr,xxr);  
    d=sqrt(xxr.^2+yyr.^2)*1e3;
    h=z-z(f(i));
    h=h-d.^2/(2.*R*1e3);
    sl=atand(h./d);
    fd=find(d>3*res*1e3);
    slfd=sl(fd);
    idx=find(slfd(:)>3);
    slaz=unique(round(az(idx))); % in what azimuths relative to the point are obstacles
    zp(i)=length(slaz)/length(azbins);

%%% now i want to plot zp(i) in the point (xx(f(i)),yy(f(i)))

end

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Answer 1

Image Analyst 2018-1-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/379410-two-data-sets-two-colorbars-on-same-figure#answer_302149

在 MATLAB Online 中打开

Use subplot()

subplot(1, 2, 1);
% Now plot first graph or image.
subplot(1, 2, 2);
% Now plot second graph or image.

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yonatan s 2018-1-29

perhaps i wasn't so clear, i was a bit confused myself. the data in "inside circle" correspond to the coordinates in the black circle in "topo". i want the data in figure "insidecircle" to be plot on the same figure as "topo", but with a different colorbars, for example colormap jet.

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