MATLAB: Creating multi-line title with variable values

plot

doy=100;  %double
igs=abcd; %string
title({'ERROR (m)';'doy:';'igs:'})

How can I write "doy" variable (100) and "igs" variable (abcd) right near the 'doy:' and 'igs:' on the title?

Best Answer

You can also make a multiline title by constructing a string with newline charcters. This is trivial to construct using sprintf and the arguments:

txt = sprintf('ERROR (m)\ndoy: %d\nigs: %s',doy,igs)
title(txt)

Or, if you really wish to use a cell array:

 C = {'ERROR (m)',sprintf('doy: %d',doy),['igs: ',igs]};
 title(C)

Related Solutions

MATLAB: How to generate a TEC map by interpolating a 3D matrix in a .mat file

clc
close all
clear all
filename = 'gps_tec2hr_igs_20150317_v01.cdf';
[data, info] = cdfread(filename);
latIGS = cdfread(filename,'Variable','lat'); latIGS = latIGS{1};
lonIGS = cdfread(filename,'Variable','lon'); lonIGS = lonIGS{1};
igs = cdfread(filename,'Variable','tecIGS'); 
Epoch = cdfread(filename,'Variable','Epoch'); 
figure(1)
for iplot = 1:12
subplot(3,4,iplot)
imagesc(lonIGS,latIGS,igs{iplot},[0 104]);
colormap(jet);
colorbar
title([datestr(todatenum(Epoch{iplot}),'dd-mmm-yyyy HH:MM:SS')]);
set(gca,'ydir','normal');
end
figure(2)
iplot= 10; % get the data for 18:00
imagesc(lonIGS,latIGS,igs{iplot});
colormap(jet);
colorbar
title({'IGS 2h TEC Map';'TEC/TECU'; ...
    [datestr(todatenum(Epoch{iplot}),'dd-mmm-yyyy HH:MM:SS')]});
set(gca,'ydir','normal');
axis equal
axis tight
% georeference the data
latIGS = double(latIGS);
lonIGS = double(lonIGS);
R1 = makerefmat('RasterSize',size(igs{iplot}), ...
    'Latlim', [min(latIGS(:)) max(latIGS(:))], ...
    'Lonlim', [min(lonIGS(:)) max(lonIGS(:))] );
dataTEC = flipud(igs{iplot});
figure(3);
hold on;
mapshow(zeros(size(dataTEC)),R1,'CData',dataTEC,'DisplayType','surface');
cW = mapshow(dataTEC,R1,'DisplayType','contour','linecolor','black', ...
    'showtext','on');
colormap(jet)
colorbar('location','southoutside');
axis equal
axis tight
title({'IGS 2h TEC Map';'TEC/TECU'; ...
    [datestr(todatenum(Epoch{iplot}),'dd-mmm-yyyy HH:MM:SS')]});
figure(4);
gcm = worldmap([min(latIGS) max(latIGS)], [min(lonIGS) max(lonIGS)]);
hold on;
load('coast');
geoshow(gcm,dataTEC,R1,'DisplayType','texturemap');
plotm(lat,long,'color','black');
colormap(jet)
colorbar('location','southoutside');
axis equal
axis tight
title({'IGS 2h TEC Map';'TEC/TECU'; ...
    [datestr(todatenum(Epoch{iplot}),'dd-mmm-yyyy HH:MM:SS')]});

MATLAB: How to display an error if a file doesn’t exist

ftpobj = ftp('cddis.nasa.gov');
dirStr = sprintf('/gnss/data/daily/2020/brdc/'; 
cd(ftpobj, dirStr);     
for i=1:days2get 
  fileStr = sprintf('BRDC00IGS_R_2020%03d0000_01D_MN.rnx.gz', doy(i));
  d=dir(ftpobj,fileStr);
  if isempty(d)
    f = errordlg(['File: ' fileStr ' not found','File Error');
    continue
  end
  mget(ftpobj, fileStr, '.');  
end
gunzip('*.gz');

The dirStr has a what appears superfluous doy(i) after it -- didn't look like the site had additional structure; the files as listed were at the above directory.

Above will popup a dialog; you can do whatever instead -- the trick is to see if the dir() call is/is not empty. If the file exists, it'll be an ordinary-looking MATLAB dir() output struct.

Above worked when tried here...

Best Answer

Related Solutions

MATLAB: How to generate a TEC map by interpolating a 3D matrix in a .mat file

MATLAB: How to display an error if a file doesn’t exist

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