How to change the image input size for this Vnet code?

I have this code and I need to change the input to [40 40 40] instead of [64 64 64]

https://www.mathworks.com/matlabcentral/fileexchange/71521-3-d-deep-learning-lung-tumor-segmentation

[Walter Roberson]

imresize3()

[Amira Youssef]

does this work for mat files?

[Walter Roberson]

@Amira Youssef

No, but mat files are binary vectors, never 3D arrays. Variables stored in mat files might be 3D arrays, so you would apply the imresize3() to the loaded data at the time you load it.