# MATLAB: Index Exceeds Number of Array Elements Error in For Loop

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I keep receiving the following error on line 36 (Icom2=….): Index exceeds the number of array elements (1). I am unsure what is wrong as I have tried everything I can think of to resolve the issue.
``%William D. -  ME411 HWK4  -  October 4, 2020  load trial1.txtM=86; %Total Body Mass is 85kgx1=trial1(:,1);x2=trial1(:,3);y1=trial1(:,2);y2=trial1(:,4);fs=100;t=[1/fs:1/fs:length(trial1)/fs];plot(t,trial1)xlabel('Time')ylabel('Position')title('Trial Data')%>>>>Combined Foot and Leg Mass<<<<footandlegM=0.061*M;fprintf('Combined foot and leg Mass=')disp(footandlegM)%>>>>Center of Mass for Combined Foot and Leg<<<<<for i=1:length(trial1)    Lo(i)=sqrt((x1(i)-x2(i))^2+(y1(i)-y2(i))^2);endL=mean(Lo);COMp=0.606*L;      %Nearest ProximalCOMd=0.394*L;      %Nearest Distalfprintf('COMproximal=')disp(COMp)fprintf('COMdistal=')disp(COMd)%>>>>>Moment of Intertia - about COM<<<<<COG=0.416*L;Icom=(footandlegM)*COG^2;fprintf('Icom=')disp(Icom)for k=1:length(Lo)   %Varying With Time   COG2(k)=0.416*Lo(k);   Icom2(k)=(footandlegM)*COG(k)^2end%>>>>>Moment of Intertia - about knee<<<<< P=0.735*L;          Ip=footandlegM*P^2;      %Proximal Radius of Gyration %for j=1:length(Lo)    % for c=1:length(Lo)     %    PII=0.735*Lo(c);          %end     %IIp(j)=footandlegM.*(PII(j)).^2;   %Inertia with time %end Iu=Icom+(COMp^2)*(footandlegM);    %Parallel Axis Theorem fprintf('Ip=') disp(Ip) fprintf('Iparallelaxis=') disp(Iu) %>>>>>Time and Inertia Value<<<<<%Nobody Cares, Work Harder%Keep Hammering``

• ``COG=0.416*L;``
``for k=1:length(Lo)   %Varying With Time   COG2(k)=0.416*Lo(k);   Icom2(k)=(footandlegM)*COG(k)^2end``