Problem with undefined function

3 次查看（过去 30 天）
Ourania
Ourania 2023-1-29
编辑： Torsten 2023-1-29
Here , it a part of my code.
PGA=[1.0000000e-01,2.0000000e-01,4.0000000e-01,9.00000e-01,1.00000e+00,1.4000000e+00,0.500000e+00,1.700000e+00,2.00000e+00,2.5000000e+00,2.800000e+00,3.5000000e+00].';
Z1=log(PGA/th1)/b1;
for i=0:1:11
if Z1(i+1)<0
Z1(i+1)=Z1(i+1)+1;
P1=logncdf(Z1(i+1));
else
P1=logncdf(Z1(i+1));
end
P1(i+1)=P1;
end
disp(P1);
Error message:
Undefined function 'logncdf' for input arguments of type 'double'.
Error in excersise_1 (line 25)
P1=logncdf(Z1(i+1));

请先登录，再回答此问题。

回答（2 个）

Paul
Paul 2023-1-29
logncdf is a function in the Statistics and Machine Learning Toolbox. That toolbox needs to be installed and it will have to be included on your license.
Torsten
Torsten 2023-1-29
编辑：Torsten 2023-1-29
Ran in:
An alternative without the toolbox:
logncdf_user = @(x,mu,sigma) 0.5*(erf((log(x)-mu)/(sqrt(2)*sigma))+1);
x=0:0.1:10;
hold on
plot(x,logncdf_user(x,0,1))
plot(x,logncdf(x,0,1))
hold off
grid on

类别

在 Help Center 和 File Exchange 中查找有关 Support Vector Machine Regression 的更多信息

标签

产品


版本

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by