How do I use m_map in octave

问题

I have installed octave on linux ubuntu running as a guest on ubuntu. I am able to plot contours and from http://www2.ocgy.ubc.ca/~rich/map.html#examples. I have also installed m_map and gshhs (both for gmt and for shapefiles, and gmt has been installed). From the instructions on the above site, am not able to link my script (mfile) to the basemap. My script is below

#!/usr/bin/octave

data=load('meansr.txt');
x = data(:,1);
y = data(:,2);

obs = data(:,3);

% create a regular mesh

[xi,yi] = ndgrid(22:0.1:34,-18:0.1:-8);

% number of influential points

m = 29;

% compute the first guess (or background), here we take the mean of all observations

mean_obs = mean(obs);

% remove the mean

f = obs - mean_obs;

% background estimation (here the mean)

var = 0.01 * ones(size(f));

% call optiminterp

[fi,vari] = optiminterp2(x,y,f,var,1.5,1.5,m,xi,yi);

%put back the mean

obsi = fi + mean_obs;

saveas(gcf,'rainzam.pdf'); % This prints to file

% insert basemap

m_proj('mercator','lat',[-18 -8],'lon',[22 34],'aspect',.8);
m_gshhs_i('patch',[.5 .6 .5]);
m_grid('tickdir','out','yaxislocation','left',...
   'xaxislocation','bottom','xlabeldir','middle','ticklen',.02);

These last three lines give errors. I would appreciate advice on how to set up the gshhs_shp directory in relation to m_map, and which paths to change. Currently gshhs_shp directory is in m_map/private.

来源：https://stackoverflow.com/questions/26438895/how-do-i-use-m-map-in-octave