54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* This file is part of the micropython-ulab project,
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*
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* https://github.com/v923z/micropython-ulab
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019-2021 Zoltán Vörös
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* 2020 Scott Shawcroft for Adafruit Industries
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* 2020 Roberto Colistete Jr.
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* 2020 Taku Fukada
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "py/misc.h"
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#include "../ulab.h"
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#include "../ulab_tools.h"
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#include "carray/carray_tools.h"
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#include "stats.h"
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#if ULAB_MAX_DIMS > 1
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#if ULAB_NUMPY_HAS_TRACE
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//| def trace(m: ulab.numpy.ndarray) -> _float:
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//| """
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//| :param m: a square matrix
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//|
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//| Compute the trace of the matrix, the sum of its diagonal elements."""
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//| ...
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//|
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static mp_obj_t stats_trace(mp_obj_t oin) {
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ndarray_obj_t *ndarray = tools_object_is_square(oin);
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COMPLEX_DTYPE_NOT_IMPLEMENTED(ndarray->dtype)
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mp_float_t trace = 0.0;
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for(size_t i=0; i < ndarray->shape[ULAB_MAX_DIMS - 1]; i++) {
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int32_t pos = i * (ndarray->strides[ULAB_MAX_DIMS - 1] + ndarray->strides[ULAB_MAX_DIMS - 2]);
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trace += ndarray_get_float_index(ndarray->array, ndarray->dtype, pos/ndarray->itemsize);
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}
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if(ndarray->dtype == NDARRAY_FLOAT) {
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return mp_obj_new_float(trace);
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}
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return mp_obj_new_int_from_float(trace);
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}
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MP_DEFINE_CONST_FUN_OBJ_1(stats_trace_obj, stats_trace);
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#endif
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#endif
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