MATLAB中的几个误差分析

sse = sum((y - Y).^2)
mse = mean(sum((y - Y).^2))
mae = mean(abs(y - Y))
mape = mean(abs((y - Y)./TakePictures_HSV))
rmse = sqrt(mean((y).^2))
r2 = 1 - (sum((Y - y).^2) / sum((Y - mean(y)).^2))