How to solve Error - Index in position 1 is invalid. Array indices must be positive integers or logical values.

Hi, i wonder what is the problem with the script as the error showed like this "Index in position 1 is invalid. Array indices must be positive integers or logical values."

This is the script that I run:

clc;clear all;close all;

A1 = load('Mtxj_FULL_ASCENDING.txt');
A2 = load('Mtxj_FULL_DESCENDING.txt');
B1 = load('N2j1c_FULL_ASCENDING.txt');
B2 = load('N2j1c_FULL_DESCENDING.txt');

offset = 0;
A = [A1;A2];
B = [B1;B2];
B = [B(:,1:8) B(:,9)+offset B(:,10:end)];

lat1 = A(:,1);  lat2 = B(:,2);
lon1 = A(:,2);  lon2 = B(:,3);
mss1 = A(:,4);  mss2 = B(:,9);

scatter(lon1,lat1,'.r');hold on;
scatter(lon2,lat2,'.b');hold on;

F = scatteredInterpolant(B(:,2), B(:,3), (1:size(B,1)).', 'nearest');
A_is_nearest_idx = F( A(:,1:2) );
B_closest_to_A = B(A_is_nearest_idx,:);

Answer 1

[Stephan]

A1 = load('Mtxj_FULL_ASCENDING.txt');
A2 = load('Mtxj_FULL_DESCENDING.txt');
B1 = load('N2j1c_FULL_ASCENDING.txt');
B2 = load('N2j1c_FULL_DESCENDING.txt');

offset = 0;
A = [A1;A2];
B = [B1;B2];
B = [B(:,1:8) B(:,9)+offset B(:,10:end)];

lat1 = A(:,1);  lat2 = B(:,2);
lon1 = A(:,2);  lon2 = B(:,3);
mss1 = A(:,4);  mss2 = B(:,9);

scatter(lon1,lat1,'.r');hold on;
scatter(lon2,lat2,'.b');hold on;

F = scatteredInterpolant(B(:,2), B(:,3), (1:size(B,1)).', 'nearest');
A_is_nearest_idx = F( A(:,1:2) );

% Your data is corrupt at least at pos. 2240 and 3121 - convert to integer
% data type, to fix the error
A_is_nearest_idx = uint16(A_is_nearest_idx);

B_closest_to_A = B(A_is_nearest_idx,:);

[hanif hamden]

Thank you very much Sir. How to determine at which point the data is corrupted?

[Stephan]

By hand in this case. But it could also be automated.