m_proj error with strcmp(map_projection...

Error using strcmp Too many input arguments.

Error in m_proj (line 105) if strcmp(MAP_PROJECTION.version.Name,'Octave')

[KALYAN ACHARJYA]

Code?

[ANKUR KUMAR]

Please attach the your codes too to get help in an effective way.

[Chad Greene]

Note: the m_proj function is part of M_Map, not Matlab's Mapping toolbox.

[Fernand ASSENE]

Hello everyone. I got the same problem as Tumelo Maja :

    Error using strcmp
    Too many input arguments.
    Error in m_proj (line 105)
    if strcmp(MAP_PROJECTION.version.Name,'Octave')

since i started to use m_map 1.4j (released May/2018).

i tried to go back to older versions, but the problem remains the same.

This is my code :

%plot results
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    ax1 = subplot(4,2,[1 2 5 6]) %PV ertel
    m_proj('mercator','lon',[0 12],'lat',[0 11])
    m_pcolor(lonpv,latpv,PV(:,:,Kplot)'), shading flat, caxis([-2e-7 2e-7])
    ax11 = colorbar; 
    title(ax11,{'PV (s^-^1 m^-^1)'}); colormap(ax1,bluewhitered(1024)); 
    hold on
    m_contour(lonpv,latpv,PV(:,:,Kplot)',50,'k')
    hold off
    title('PV Ertel');xlabel('Longitude (°E)');ylabel('Latitude (°N)')
    
    ax2 = subplot(4,2,[3 4  7 8]) % PV rescaled
    m_proj('mercator','lon',[0 12],'lat',[0 11])
    m_pcolor(lonpv,latpv,PV_r(:,:,Kplot)'), shading flat, caxis([-2e-4 2e-4])
    ax22 = colorbar; 
    title(ax22,{'PV_r (s^-^1 m^-^1)'}); colormap(ax2,bluewhitered(1024)); 
    hold on
    m_contour(lonpv,latpv,PV(:,:,Kplot)',50,'k')
    hold off
    title('PV rescaled');xlabel('Longitude (°E)');ylabel('Latitude (°N)')

In attached (photo), another use of m_map toolbox function with the same error massage.

Thank's to all for further help and answers !!!

[Rik]

I think you are better off posting your own question. Before you do, read the advice here: https://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

[Walter Roberson]

You are using an old version. The current m_proj from https://www.eoas.ubc.ca/~rich/map.html#download has that code at line 140.

In the meantime, please show us the result you get from executing

v = ver('matlab')

There were some obscure cases in which ver could report more than one thing for MATLAB