MATLAB Answers

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

37 views (last 30 days)
hanif hamden on 27 Nov 2020
Commented: Stephan on 28 Nov 2020
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,:);

#### 0 Comments

Sign in to comment.

### Accepted Answer

Stephan on 27 Nov 2020
Edited: Stephan on 27 Nov 2020
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,:);

#### 2 Comments

hanif hamden on 28 Nov 2020
Thank you very much Sir. How to determine at which point the data is corrupted?
Stephan on 28 Nov 2020
By hand in this case. But it could also be automated.

Sign in to comment.

R2019a

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by