why is there an error in line 13 of my coding ?

%Matlab cache clearing commands
clc;                                                                        %clears command window
clear all;                                                                  %clears workspace variables
close all;                                                                  %closes all external matlab windows
%input starts here
Hte=100;                                                                    %Base Station Height between 30 m and 1000 m
Hre=10;                                                                     %Mobile Station Antenna Height between 1 m and 10 m
d =[1,10,20,30,40,50,60,70,80,100];                                                                       %distance from base station between 1Km and 100Km
f=200:900; % MADE AN ARRAY FROM f                                           %Frequency between 150Mhz and 1920Mhz
Amu = 18;                 %Median attenuation
Kcor =9;                 %Correction factor
%SUBURBAN AREA
Lfsl = 10*log((((3*10^8)./f)).^2)/((4*pi)^2)*d^2;                                               % finding free space loss
Ghte = 20*log(Hte/200);                                                                          % Base station antenna height gain factor
if(Hre>3)
    Ghre = 20*log(Hre/3);                                                                        % Mobile station antenna height gain factor
else
    Ghre = 10*log(Hre/3);
end
L = Lfsl+Amu-Ghte-Ghre-Kcor;                                                          % formula for path loss
disp(L)                                                                     %prints the Loss Array
% plot of Loss (dB) vs Distance for surburban
figure(1)                                                                   %Enables the figure
plot(f,L);                                                                  %versus plotting command
title('Distance vs Loss (dB)  for suburban for Okumura Model');            %title of the plot
xlabel('Distance(Km)');                                                    %label for X-axis
ylabel('Propagation Path loss(dB)');                                        %label for Y-axis
grid on;                                                                    %Enables Grid feature in plot
%inputs
%    50
%    5
%    10
%    [200 300 400 500 600 700 800 900 1000 1100]
%    [20.4 20.45 20.5 20.55 20.6 20.65 20.7 20.75 20.8 20.85]
%    [23 24 25 25.5 26 27 27.5 28 28.75 29]

Answer 1

[Walter Roberson]

Lfsl = 10*log((((3*10^8)./f)).^2)/((4*pi)^2).*d.^2;                                               % finding free space loss

[NORFAZNEZA NAZLINDA MOHD NORDIN]

i had try but in command window it say

Matrix dimensions must agree.

Answer 2

[Alan Stevens]

In addition to Walter's correction, note that f and d contain a different number of elements, so element by element operations will also fail.

[Walter Roberson]

Good point.