Subscript indices must either be real positive integers or logicals.

Hi I tried to run this coding, but always getting error which is subscripts indices must either be real positive integers or logicals.

Here is my coding, I also attach the file starting from Data1 line.

clear all

clc

ncfile = 'filename.nc' ; % nc file name

% To get information about the nc file

ncinfo(ncfile)

% % to display nc file

ncdisp(ncfile)

% % to read a vriable 'var' exisiting in nc file

SSS = ncread(ncfile,'SSS_corr') ;

Lat = ncread(ncfile, 'Latitude');

Lon = ncread(ncfile, 'Longitude');

% SSS1 = SSS(1:end);

% Lat1 = Lat (1:end);

% Lon1 = Lon (1:end);

Data = [Lat(:),Lon(:),SSS(:)];

id = (Lat>=0&Lat<=14);

Data1 = Data(id,:,:);

X = Data1(:,1);

Y = Data1(:,2);

Z = Data1(:,3);

Lat1 = X;

Lon1 = Y;

SSS1 = Z;

n = length(Lat1);

minlat = 1;

maxlat = 14;

minlon = 95;

maxlon = 126;

% gridsize = 0.125;

[XX,YY] = meshgrid(linspace(minlat(Lat1),maxlat(Lat1),n),linspace(minlon(Lon1),maxlon(Lon1),n));

zz = surfergriddata(X,Y,Z,XX,YY, 'kriging')

Here is the error

Subscript indices must either be real positive integers or logicals.

Error in Copy_of_SMOS_nc (line 36)

[XX,YY] = meshgrid(linspace(minlat(Lat1),maxlat(Lat1),n),linspace(minlon(Lon1),maxlon(Lon1),n));

Answer 1

[VBBV]

[XX,YY] = meshgrid(linspace((Lat1(minlat),(Lat1(maxlat),n),linspace((Lon1(minlon)),(Lon1(maxlon),n))

[VBBV]

Use the linspace command this way for Meshgrid command.

[VBBV]

% search the minlat , maxlat minlon & maxlon in the Arrays Lat1, Lon1 and
% input to linspace,meshgrid commands if thats what you actually need
LaMi = Lat1(Lat1 == minlat);
LaMa = Lat1(Lat1 == maxlat);
LoMi = Lon1(Lon1 == minlon);
LoMa = Lon1(Lon1 == maxlon);
[XX,YY] = meshgrid(linspace(Lat1(LaMi(1)),Lat1(LaMa(1)),n),linspace(Lon1(LoMi(1)),Lon1(LoMa(1)),n))

Answer 2

[Image Analyst]

See the FAQ:

https://matlab.fandom.com/wiki/FAQ#%22Subscript_indices_must_either_be_real_positive_integers_or_logicals.%22