remove axis numpy array
To remove an axis from a NumPy array in C, you can use the reshape
function. Here's an example:
#include <stdio.h>
#include <stdlib.h>
#include <numpy/arrayobject.h>
int main() {
Py_Initialize();
import_array();
// Create a 2D NumPy array
npy_intp dims[2] = {3, 4}; // dimensions of the array
PyObject* array = PyArray_SimpleNew(2, dims, NPY_DOUBLE);
// Reshape the array to remove the second axis
npy_intp new_dims[1] = {dims[0]};
PyObject reshaped_array = PyArray_Newshape((PyArrayObject)array, new_dims, NPY_CORDER);
// Print the reshaped array
double data = PyArray_DATA((PyArrayObject)reshaped_array);
for (int i = 0; i < new_dims[0]; i++) {
printf("%f ", data[i]);
}
printf("\n");
Py_DECREF(array);
Py_DECREF(reshaped_array);
Py_Finalize();
return 0;
}
In this example, we first create a 2D NumPy array using the PyArray_SimpleNew
function. Then, we use the PyArray_Newshape
function to reshape the array and remove the second axis. Finally, we print the reshaped array using a loop.
Note that before running this code, you need to have the NumPy C API installed and linked correctly with your C code. You also need to include the necessary headers and initialize the Python interpreter using Py_Initialize()
.