Dot indexing is not supported for variables of this type

i am trying to run this code but is not working can you please help me with this

%%
%Data Collection and Labeling
clc;
clear all;
labelPoints = {[2,50],[51,80]}; 
NoOfFailureModes = 2;
estimateRULFlags = [false, true]; 
path = 'Datasets/'; 
labels = {[categorical("OFF"),categorical("ON"),categorical("DUCT BLOCKAGE")],[categorical("OFF"),categorical("ON"),categorical("ROTOR IMBALANCE")]};

rawdata = cell(NoOfFailureModes);
data = cell(NoOfFailureModes);

for i = 1:NoOfFailureModes
    rawdata{i} = readtable([path 'Dataset' num2str(i) '.csv'],'Delimiter',','); %Read the downloaded csv file
    data{i} = dataParsing(rawdata{i},labelPoints{i},labels{i},i); %Parse the rawdata
end

function data = dataParsing(rawdata,labelPoints,labels,dataset)
    bias = 44;
    noOfDataPoints = length(rawdata.entry_id);
    labelPoints = [0 labelPoints noOfDataPoints];

    for i = 1:length(labelPoints)-1 
        Label(labelPoints(i)+1:labelPoints(i+1),:) = labels(i); %Create Labels for the data points
    end
    j = 1;

    if(dataset == 2)
        offset = 0;
    else
        offset = 2000;
    end

    for i = 1:noOfDataPoints
        text1 = strsplit(rawdata.field1{i},',');
        text2 = strsplit(rawdata.field2{i},',');
        text3 = strsplit(rawdata.field3{i},',');
        text4 = strsplit(rawdata.field4{i},',');
        text5 = strsplit(rawdata.field5{i},',');
        text6 = strsplit(rawdata.field6{i},',');
        var = zeros(length(text1)-1,6);
        flag = true;
        for k = 1:length(text1)-1 %to neglect the last comma, use -1 
           var(k,1) = str2num(text1{k})-bias;
           var(k,2) = str2num(text2{k})-bias;
           var(k,3) = str2num(text3{k})-bias;
           if(var(k,1) ~= -bias || var(k,2) ~= -bias || var(k,3) ~= -bias ) %Turning the device off and on will reset the first data set to all zeroes
               var(k,4) = str2num(text4{k})-bias;
               var(k,5) = str2num(text5{k})-bias;
               var(k,6) = str2num(text6{k})-bias;
           else
               flag = false;
               break;
           end
        end
        if(flag) %accept a valid datapoint
            data.Label(j,:) = Label(i);
            data.sno(j,:) = rawdata.entry_id(i) + offset;
            data.X(j,:) = [var(:,1);var(:,4)];
            data.Y(j,:) = [var(:,2);var(:,5)];
            data.Z(j,:) = [var(:,3);var(:,6)];
            j = j+1;
        end
    end

    data = struct2table(data);

end

[Adam Danz]

Provide the full error message, tell us what line is causing that error (the line number is included in the error message but we don't see line numbers so just tell us the line), and describe what variables are used in that line (class & size).

[Aniket Manjare]

Here i have scrrenshot of error and i have also attaches the data set

Answer 1

[Walter Roberson]

    for i = 1:noOfDataPoints
        var1 = rawdata.field1(i);
        var2 = rawdata.field2(i);
        var3 = rawdata.field3(i);
        var4 = rawdata.field4(i);
        var5 = rawdata.field5(i);
        var6 = rawdata.field6(i);

        %Turning the device off and on will reset the first data set to all zeroes
        
        if var1 ~= 0 || var2 ~= 0 || var3 ~= 0
            var = [var1, var2, var3, var4, var5, var6] - bias;
            data.Label(j,:) = Label(i);
            data.sno(j,:) = rawdata.entry_id(i) + offset;
            data.X(j,:) = [var(1);var(4)];
            data.Y(j,:) = [var(2);var(5)];
            data.Z(j,:) = [var(3);var(6)];
            j = j+1;
        end
    end

[Aniket Manjare]

Thanks, i have labelled my data with code, Thakyou

[Aniket Manjare]

I am facing the issue with the further part of the code. Please help me to solve this

The error is occuring here ar this point

    P1 = P2(1:L/2+1)

Please find the attachment for program file .m and datasets files, Kindly help

below is the code for the exploration:

%%
%Data Exploration
fs = 100; %Sampling Frequency
L = 100; %Length of each data sample is 100 sensor readings
f = fs*(0:(L/2))/L; % Frequency bins until Nyquist Frequency at which FFT is computed
convertToMinutes = (1/fs)/60; %Convert sample number to minutes 0.01/60
votype = 'VideoWriter'; %Record the Exploration to view it again
vo = VideoWriter('Data Exploration Video', 'MPEG-4');
set(vo, 'FrameRate', 5); 
open(vo);
for i = 1:NoOfFailureModes
    NoOfDataPoints = height(data{i});
    x = zeros(L*NoOfDataPoints,0);
    y = zeros(L*NoOfDataPoints,0);
    z = zeros(L*NoOfDataPoints,0);
    figure;
    set(gcf,'Visible','on')
    for j = 1:NoOfDataPoints
        data{i}.X_FFT(j,:) = computeFFT(data{i}.X(j,:)-mean(data{i}.X(j,:)),L);  
        data{i}.Y_FFT(j,:) = computeFFT(data{i}.Y(j,:)-mean(data{i}.Y(j,:)),L);
        data{i}.Z_FFT(j,:) = computeFFT(data{i}.Z(j,:)-mean(data{i}.Z(j,:)),L);
        x((j-1)*L+1 : j*L) = data{i}.X(j,:);
        y((j-1)*L+1 : j*L) = data{i}.Y(j,:);
        z((j-1)*L+1 : j*L) = data{i}.Z(j,:);
        t = (1:j*L)*convertToMinutes;
        
        subplot(3,2,1); 
        plot(t,x);  
        title({"Experiment: " + num2str(i) , "Time Domain"});
        xlabel("time (min.)",'FontWeight','bold');
        ylabel("X",'rotation',0,'FontWeight','bold'); 
        
        subplot(3,2,2); 
        bar(f,data{i}.X_FFT(j,:)); 
        title({"Sample: " + num2str(j) + "; Label: " + char(data{i}.Label(j)), "Frequency Domain"});
        xlabel("frequency (Hz)",'FontWeight','bold');
        ylabel("X",'rotation',0,'FontWeight','bold'); 
        
        subplot(3,2,3); 
        plot(t,y); 
        xlabel("time (min.)",'FontWeight','bold');
        ylabel("Y",'rotation',0,'FontWeight','bold');
        
        subplot(3,2,4); 
        bar(f,data{i}.Y_FFT(j,:)); 
        xlabel("frequency (Hz)",'FontWeight','bold');
        ylabel("Y",'rotation',0,'FontWeight','bold');
        
        subplot(3,2,5); 
        plot(t,z); 
        xlabel("time (min.)",'FontWeight','bold');
        ylabel("Z",'rotation',0,'FontWeight','bold'); 
        
        subplot(3,2,6); 
        bar(f,data{i}.Z_FFT(j,:)); 
        xlabel("frequency (Hz)",'FontWeight','bold');
        ylabel("Z",'rotation',0,'FontWeight','bold'); 
        
        drawnow;
        writeVideo(vo, getframe(gcf));
    end
end
close(vo);
%%

%%
%Helper Functions
function P1 = computeFFT(X,L)
    Y = fft(X);
    P2 = abs(Y/L);%absolute value
    P1 = P2(1:L/2+1)
    P1(2:end-1) = 2*P1(2:end-1);
end


%%

Answer 2

[Cris LaPierre]

The error appears to be line 36

text1 = strsplit(rawdata.field1{i},',');

The current error is because the variable field1 contains numeric info. Brace indexing - {i} - is not valid for a vector of doubles. Use parentheses instead.

This will lead to your next error. The function strsplit is for text data. You will get another error:

Error using strsplit (line ##)

First input must be either a character vector or a string scalar.

[Aniket Manjare]

Can you plese help me what changes i have to make in this code

[Walter Roberson]

Your code was written for a different file structure and needs to be redesigned. The file has 5 fields per line with the last one being field3. The code assumes that the field* variables are text with comma separators but in the file they are numeric; the code assumes up to field6 but there is only field3 at most.

Without documentation of the purpose of the code, and with only pictures of part of the code, we are not going to be able to advise you.

[Aniket Manjare]

Please find the data set for 6 fields,

Please help me solve this problem, i have tried alot, mistakenly i have previously loaded the wrong data set

Here i have attached the file

1. Labelling.m
2. dataset1.csv
3. dataset2.csv

[Aniket Manjare]

Walter Roberson can you please help me to solve this Issue issue https://in.mathworks.com/matlabcentral/answers/698125-facing-issue-in-fft-p1-p2-1-l-2-