Problem creating array in for loop

Question

Paul Van der Merwe 2019-2-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/445298-problem-creating-array-in-for-loop

编辑： KALYAN ACHARJYA 2019-2-16

采纳的回答： KALYAN ACHARJYA

在 MATLAB Online 中打开

Hi,

I am trying to create an array using a for loop but I keep getting an error

'Index in position 1 is invalid. Array indices must be positive integers or logical values.'

Any ideas how to solve it?

Thanks

Here is my code:

% Calculate coefficients of inversed function
coeff_IC1 = polyfit(y1, x1, 4);
coeff_EC1 = polyfit(y2, x2, 4);
% Calculate and plot inversed function y = xg(x)
valueExt_IC1 = zeros(3e5, 1);
valueP_IC1 = zeros(3e5,1);
for p_IC1 = -3e5:0
    ext_IC1 = p_IC1 * (coeff_IC1(2) + (coeff_IC1(3) * p_IC1) + (coeff_IC1(4) * p_IC1^2) + (coeff_IC1(5) * p_IC1^3));
    valueExt_IC1((p_IC1 + 1), 1) = ext_IC1;
    valueP_IC1((p_IC1 + 1), 1) = p_IC1;
end
valueExt_EC1 = zeros(1.5e5, 1);
valueP_EC1 = zeros(1.5e5,1);
for p_EC1 = 0:1.5e5
    ext_EC1 = p_EC1 *(coeff_EC1(2) + (coeff_EC1(3) * p_EC1) + (coeff_EC1(4) * p_EC1^2) + (coeff_EC1(5) * p_EC1^3));
    valueExt_EC1((p_EC1 + 1), 1) = ext_EC1;
    valueP_EC1((p_EC1 + 1), 1) = p_EC1;
end