What is wrong with the code?

Error; Index exceeds the number of array elements. Index must not exceed 1.

Error in ParallelProcessing (line 81)

if Result(i, 2) == DataSizes(2)

code;

clear all
close all
FileName = 'Model/o3_surface_20180701000000.nc';
[Contents, Lat, Lon] = ReadFilePar(FileName);
NumHours = 5;
DataSizes = [100]; % Data options to test
Workers = [2];  % Worker Options to test
%% 2: Processing parameters
% ##  provided by customer  ##
RadLat = 30.2016;
RadLon = 24.8032;
RadO3 = 4.2653986e-08;
StartLat = 1;
NumLat = 400;
StartLon = 1;
NumLon = 700;
Result = [];
NumLocations = (NumLon - 4) * (NumLat - 4);
%% 4: Cycle through the hours and load all the models for each hour and record memory use
% We use an index named 'NumHour' in our loop
% The section 'parallel processing' will process the data location one
% after the other, reporting on the time involved.
Steps = 100;
Result = [];
tic
for idx1 = 1:size(DataSizes, 2)
    DataOpt = DataSizes(idx1);
    for idx2 = 1:size(Workers, 2)
        WorkerNum = Workers(idx2);
        
        tic
        for idxTime = 1:NumHours
            [HourlyData] = LoadDataParallel(FileName, Contents, idxTime, StartLat, NumLat, StartLon, NumLon);
            [Data2Process, LatLon] = PrepareData(HourlyData, Lat, Lon);
            [EnsembleVectorPar, T3] = Parallelanalysis(RadLat, RadLon, RadO3, idxTime, DataOpt, Steps, WorkerNum, Data2Process, LatLon);
            times(idxTime) = T3;
        end
        T2 = toc;
        fprintf('Total processing time for %i workers = %.2f s\n', WorkerNum, sum(times))
        Result = [Result; DataOpt, WorkerNum, sum(times)];
        delete(gcp);
    end
end
x1Values = Workers;
y1Values = [];
x2Values = Workers;
y2Values = [];
x3Values = Workers;
y3Values = [];
Result(1, 3)
size(Result, 1)
%% Iterate through all of the results and decide which array to append the result to.
for i = 1 : size(Result, 1)
    if Result(i, 2) == DataSizes(1)
        y1Values = [y1Values; Result(i, 3)];
    end
    if Result(i, 2) == DataSizes(2)
        y2Values = [y2Values; Result(i, 3)];
    end
    if Result(i, 2) == DataSizes(3)
        y3Values = [y3Values; Result(i, 3)];
    end
end
figure(1)
yyaxis left
plot(Workers, Result, '-bd')
xlabel('Number of Processors')
ylabel('Processing time (s)')
title('Processing time vs number of processors')
%% 10: Reshape ensemble values to Lat, lon, hour format%% Parallel Analysis
%EnsembleVectorPar = reshape(EnsembleVectorPar, 696, 396, []);

Answer 1

[Image Analyst]

Since you define Datasizes as a scalar:

DataSizes = [100]; % Data options to test

why do you think that a second element exists, as if it's an array or something, instead of a scalar?