Programming Articles - Page 803 of 3363

To return all the non-masked data as a 1-D array, use the ma.MaskedArray.compressed() method in Numpy. A mask is either nomask, indicating that no value of the associated array is invalid, or an array of booleans that determines for each element of the associated array whether the value is valid or not.The numpy.ma.MaskedArray is a subclass of ndarray designed to manipulate numerical arrays with missing data. An instance of MaskedArray can be thought as the combination of several elements:StepsAt first, import the required library −import numpy as np import numpy.ma as maCreate an array with int elements using the numpy.array() method ... Read More

To swap the bytes of the masked array, use the ma.MaskedArray.byteswap() method in Numpy. The parameter "inplace" is set to True i.e. swap bytes in-place.Toggle between low-endian and big-endian data representation by returning a byteswapped array, optionally swapped in-place. Arrays of byte-strings are not swapped. The real and imaginary parts of a complex number are swapped individually. It returns the byteswapped array. If inplace is True, this is a view to self.The numpy.ma.MaskedArray is a subclass of ndarray designed to manipulate numerical arrays with missing data. An instance of MaskedArray can be thought as the combination of several elements −StepsAt ... Read More

To swap the bytes of the array elements, use the ma.MaskedArray.byteswap() method in Numpy. Toggle between low-endian and big-endian data representation by returning a byteswapped array, optionally swapped in-place. Arrays of byte-strings are not swapped. The real and imaginary parts of a complex number are swapped individually. It returns the byteswapped array. If inplace is True, this is a view to self.The numpy.ma.MaskedArray is a subclass of ndarray designed to manipulate numerical arrays with missing data. An instance of MaskedArray can be thought as the combination of several elements −StepsAt first, import the required library −import numpy as np import ... Read More

To return the copy of the array, cast to a specified type, use the ma.MaskedArray.astype() method in Numpy. The parameter is the data-type to which the array is cast. Another parameter, order controls the memory layout order of the result. ‘C’ means C order, ‘F’ means Fortran order, ‘A’ means ‘F’ order if all the arrays are Fortran contiguous, ‘C’ order otherwise, and ‘K’ means as close to the order the array elements appear in memory as possible. Default is ‘K’.Casting between a simple data type and a structured one is possible only for “unsafe” casting.Casting to multiple fields is ... Read More

To repeat elements of a masked array, use the ma.MaskedArray.repeat() method in Numpy. The "repeats" parameter sets the number of repetitions for each element. Here, repeats is broadcasted to fit the shape of the given axis. It returns the output array which has the same shape as a, except along the given axis.The axis is the axis along which to repeat values. By default, use the flattened input array, and return a flat output array.StepsAt first, import the required library −import numpy as np import numpy.ma as maCreate an array with int elements using the numpy.array() method −arr = np.array([[55, ... Read More

To set storage-indexed locations to corresponding values, use the ma.MaskedArray.put() method in Numpy. The "mode" parameter specifies how out-of-bounds indices will behave. Sets self._data.flat[n] = values[n] for each n in indices. If values is shorter than indices then it will repeat. If values has some masked values, the initial mask is updated in consequence, else the corresponding values are unmasked.The indices are the target indices, interpreted as integers. The mode specifies how out-of-bounds indices will behave. ‘raise’ : raise an error. ‘wrap’ : wrap around. ‘clip’ : clip to the range.StepsAt first, import the required library −import numpy as np ... Read More

To copy an element of an array to a standard Python scalar and return it, use the ma.MaskedArray.item() method in Numpy.The *args parameter, ifnone − in this case, the method only works for arrays with one element (a.size == 1), which element is copied into a standard Python scalar object and returned.int_type − this argument is interpreted as a flat index into the array, specifying which element to copy and return.tuple of int_types − functions as does a single int_type argument, except that the argument is interpreted as an nd-index into the array.StepsAt first, import the required library −import numpy ... Read More

To return a view of the MaskedArray data in Numpy, use the ma.MaskedArray.view() method.The a.view() is used two different waysa.view(some_dtype) or a.view(dtype=some_dtype) constructs a view of the array’s memory with a different data-type. This can cause a reinterpretation of the bytes of memory.a.view(ndarray_subclass) or a.view(type=ndarray_subclass) just returns an instance of ndarray_subclass that looks at the same array. This does not cause a reinterpretation of the memory.StepsAt first, import the required library −import numpy as np import numpy.ma as maCreate an array with int elements using the numpy.array() method −arr = np.array([[35, 85], [67, 33]]) print("Array...", arr) print("Array type...", arr.dtype)Get the ... Read More

To return specified diagonals, use the ma.MaskedArray.diagonal() method in Numpy. Set the Offset of the diagonal from the main diagonal. Can be positive or negative.A masked array is the combination of a standard numpy.ndarray and a mask. A mask is either nomask, indicating that no value of the associated array is invalid, or an array of booleans that determines for each element of the associated array whether the value is valid or not.StepsAt first, import the required library −import numpy as np import numpy.ma as maCreate an array with int elements using the numpy.array() method −arr = np.array([[55, 85, 59, ... Read More

In this problem, we are given string str[] of size N and an integer X. Our task is to create a program to print First X vowels from a string.We will print first X vowels from the string and if less than X vowels are present, print -1.Let's take an example to understand the problem, Input: str = "learn C programming language", X = 5 Output: e, a, o, a, i Vowels are a, e, i, o, uSolution ApproachA simple solution to the problem is by traversing the string character by charter. And storing all the vowels of the string ... Read More