Getting all pixel values along this line

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Sophia
Sophia on 13 Jul 2016
Commented: Walter Roberson on 14 Jul 2016
I want to check how the pixel values along this line have been changing through the different time intervals. This image is shows the mean data values for 36 years, later on i want to compare how the value along this line have been changing through time.
Which MATLAB function I can use to find the values of the pixels along which this line is passing?
figure(1);
clf;
left1 = 0.40;
cb_bottom = 0.060 ;
cb_width = 0.2 ;
cb_height = 0.02 ;
long2 = long(1:4:361,1:4:361);
lat2 = lat(1:4:361,1:4:361);
U2 = mean_wint_u(1:4:361,1:4:361);
V2 = mean_wint_v(1:4:361,1:4:361);
idx = ~isnan(U2) & ~isnan(V2);
m_proj('Stereographic','lat',90,'long',300,'radius',35,'rect','on');
m_contourf(long,lat,mean_wint_rho(:,:),100,'linestyle','none'); mean_wint_rho is 361*361
m_grid('linewi',1,'tickdir','out',...
'xtick',[],'ytick',[]);
m_coast('patch',[.6 .6 .6],'edgecolor','k');
m_elev('contour',[ ],'edgecolor',' ');
m_quiver(long2(idx),lat2(idx),U2(idx),V2(idx),2,'LineWidth',1,'Color','k')
colorbar( 'location','southoutside',...
'position', [left1 cb_bottom cb_width cb_height])
hold on;
m_plot([146.5 -116 -99],[75.5 87 80],'r-'); [% long, lat] values of the line

Answers (1)

Walter Roberson
Walter Roberson on 14 Jul 2016
  4 Comments
Walter Roberson
Walter Roberson on 14 Jul 2016
It looks like lat and long are just arrays. But the code does use the Mapping Toolbox.
Walter Roberson
Walter Roberson on 14 Jul 2016
Correction: it uses the third party m_map toolbox

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