Undefined function or variable 'Data'.

clc, clear, close all;
 
% load jaringan yang sudah dibuat pada proses pelatihan
load net.mat
 
% Proses membaca data uji dari excel
filename = 'CurahHujan.xlsx';
sheet = 2;
xlRange = 'D25:P36';

data_uji = Data(:,1:12)'; %<------------
target_uji = Data(:,13)';
[m,n] = size(data_uji);
 
% Hasil prediksi
hasil_uji = sim(net_keluaran,data_uji);
nilai_error = hasil_uji-target_uji;
 
max_data = 450;
min_data = 58;
hasil_uji = ((hasil_uji-0.1)*(max_data-min_data)/0.8)+min_data;
 
% Performansi hasil prediksi
error_MSE = (1/n)*sum(nilai_error.^2);
 
filename = 'CurahHujan.xlsx';
sheet = 1;
xlRange = 'E11:P11';
 
target_uji_asli = xlsread(filename, sheet, xlRange);

figure,
plot(hasil_uji,'bo-')
hold on
plot(target_uji_asli,'ro-')
hold off
grid on
title(strcat(['Grafik Keluaran JST vs Target dengan nilai MSE = ',...
num2str(error_MSE)]))
xlabel('Pola ke-')
ylabel('Curah Hujan (mm)')
legend('Keluaran JST','Target','Location','Best')

can someone solve this?

Answer 1

[Walter Roberson]

You

load net.mat

but that file does not happen to contain a variable named Data

filename = 'CurahHujan.xlsx';
sheet = 2;
xlRange = 'D25:P36';

You define information about some data in an xlsx file, but you never read from the file.

By the way: these days we recommend readtable() or readmatrix() or readcell() instead of xlsread()