trying to rearange a matrix with 2 vectors of indexes and one vector of values

i have 2 vectors of rows and columns location in the destination matrix and one vector E where all the values are located, and i need to place the values of E in a matrix according to the vectors of the columns and rows

can't think of a solution maybe you can suggest something?

this is the exp file:

https://dl.dropboxusercontent.com/u/38094905/tm.exp

the columns or row vectors are rx_pos or tx_pos this is the code:

%%Read exp files and use them in matlab
% Modified: 17/09/2014

clear all
close all
clc

%slCharacterEncoding('ASCII')
fid=fopen('tm.exp');
exp_data=textscan(fid,'%f%f%f%f%f%*f%*f','Headerlines',10 ); % read only col 4 and 5 and skip the first 10 lines
                                                             % without loosing prescision!.
fclose(fid);

tx_pos=cell2mat(exp_data(1)); % position of tx antenna 1-36
rx_pos=cell2mat(exp_data(2)); % position of rx antenna
freq=cell2mat(exp_data(3));   % frequancy
reEtot=cell2mat(exp_data(4)); % real part of E_total
imEtot=cell2mat(exp_data(5)); % imaginary part of E_total

clear exp_data

% filter messurements by frequancy
frequancy=4;    % [GHz]
loc_f=find(freq==frequancy);
tx_pos=tx_pos(loc_f);
rx_pos=rx_pos(loc_f);
freq=freq(loc_f);
reEtot=reEtot(loc_f);
imEtot=imEtot(loc_f);
Etot=reEtot+1i*imEtot;

%%build the matrix rx_pos x tx_pos

[RX,TX]=meshgrid(rx_pos,tx_pos);
H=Etot(TX,RX);

clc % the Encoding Warning is relevent only for the first 10 rows of the exp file

Answer 1

[Niko]

cf. sub2ind

LinInd=sub2ind(size(YourMatrix),RowInd,ColInd);
YourMatrix(LinInd)=E;