The NumPy has a number of built-in functions which can be used for array creation and manipulation. For example, array() function is used to create ndarray object from an array-like object. Along with this, it also contains various functions for mathematical, arithmetical and statistical operations. Below is the list of most commonly used functions of NumPy:
| Function | Description |
|---|
| append() |
Appends values to the end of an array. |
| arange() |
Return evenly spaced values within a given interval. |
| array() |
Returns an array. |
| asarray() |
Converts the input to an array. |
| concatenate() |
Returns a concatenated array along the specified axis. |
| empty() |
Returns a new array of given shape and type, without initializing entries. |
| eye() |
Returns a 2-D array with ones on the diagonal and zeros elsewhere. |
| frombuffer() |
Interpret a buffer as a 1-dimensional array. |
| fromiter() |
Create a new 1-dimensional array from an iterable object. |
| histogram() |
Computes the histogram of a set of data. |
| identity() |
Returns the identity array. |
| linspace() |
Returns evenly spaced numbers over a specified interval. |
| logspace() |
Return numbers spaced evenly on a log scale. |
| ndarray.flatten() |
Returns a copy of the array collapsed into one dimension. |
| ones() |
Returns a new array of given shape and type, filled with ones. |
| ravel() |
Returns a contiguous flattened array. |
| reshape() |
Gives a new shape to an array without changing its data. |
| zeros() |
Returns a new array of given shape and type, filled with zeros. |
| Functions | Description |
|---|
| matlib.empty() |
Returns a matrix of given shape and type, without initializing entries. |
| matlib.eye() |
Returns a matrix with ones on the diagonal and zeros elsewhere. |
| matlib.identity() |
Returns the square identity matrix of given size. |
| matlib.ones() |
Returns a matrix of given shape and type, filled with ones. |
| matlib.rand() |
Return a matrix of random values with given shape. |
| matlib.randn() |
Return a random matrix with data from the “standard normal” distribution. |
| matlib.zeros() |
Returns a matrix of given shape and type, filled with zeros. |
| Functions | Description |
|---|
| average() |
Computes the weighted average along the specified axis. |
| mean() |
Computes the arithmetic mean along the specified axis. |
| median() |
Computes the median along the specified axis. |
| std() |
Compute the standard deviation along the specified axis. |
| var() |
Compute the variance along the specified axis. |
| Functions | Description |
|---|
| argmax() |
Returns the indices of the maximum values along an axis. |
| dot() |
Returns dot product of two arrays. |
| inner() |
Returns inner product of two arrays. |
| matmul() |
Returns matrix product of two arrays. |
| sort() |
Returns a sorted copy of an array. |
| sum() |
Sum of array elements over a given axis. |
| transpose() |
Reverses or permutes the axes of an array. |
| vdot() |
Returns dot product of two vectors. |
| Functions | Description |
|---|
| sin() |
Returns the trigonometric sine of an angle in radians. |
| cos() |
Returns the trigonometric cosine of an angle in radians. |
| tan() |
Returns the trigonometric tangent of an angle in radians. |
| arcsin() |
Returns the arc sine of a value. |
| arccos() |
Returns the arc cosine of a value. |
| arctan() |
Returns the arc tangent of a value. |
| hypot() |
Given the legs of a right triangle, return its hypotenuse. |
| degrees() |
Convert angles from radians to degrees. |
| radians() |
Convert angles from degrees to radians. |
| rad2deg() |
Convert angles from radians to degrees. |
| deg2rad() |
Convert angles from degrees to radians. |
| Functions | Description |
|---|
| sinh() |
Returns the hyperbolic sine of a value. |
| cosh() |
Returns the hyperbolic cosine of a value. |
| tanh() |
Returns the hyperbolic tangent of a value. |
| arcsinh() |
Returns the inverse hyperbolic sine of a value. |
| arccosh() |
Returns the inverse hyperbolic cosine of a value. |
| arctanh() |
Returns the inverse hyperbolic tangent of a value. |
| Functions | Description |
|---|
| around() |
Rounds to the given number of decimals. |
| ceil() |
Rounds the given number up to the nearest integer. |
| floor() |
Rounds the given number down to the nearest integer. |
| fix() |
Round to nearest integer towards zero. |
| rint() |
Round elements of the array to the nearest integer. |
| trunc() |
Return the truncated value of the input, element-wise. |
| Functions | Description |
|---|
| exp() |
Returns the exponent of e. |
| expm1() |
Returns the exponent of e minus 1, i.e., ex-1. |
| log() |
Returns the natural logarithm of a given number. |
| log1p() |
Returns the natural logarithm of (1+number), i.e., log(1+number). |
| log2() |
Returns the base-2 logarithm of a given number. |
| log10() |
Returns the base-10 logarithm of a given number. |
| Functions | Description |
|---|
| add() |
Add arguments element-wise. |
| subtract() |
Subtract arguments, element-wise. |
| multiply() |
Multiply arguments element-wise. |
| divide() |
Returns a true division of the inputs, element-wise. |
| true_divide() |
Returns a true division of the inputs, element-wise. |
| floor_divide() |
Return the largest integer smaller or equal to the division of the inputs. |
| power() |
Returns base raised to the power of exponent. |
| fmod() |
Return element-wise remainder of division. |
| mod() |
Return element-wise remainder of division. |
| remainder() |
Return element-wise remainder of division. |
| reciprocal() |
Return the reciprocal of the argument, element-wise. |
| Functions | Description |
|---|
| angle() |
Return the angle of the complex argument. |
| real() |
Return the real part of the complex argument. |
| imag() |
Return the imaginary part of the complex argument. |
| conj() |
Return the complex conjugate, element-wise. |
| conjugate() |
Return the complex conjugate, element-wise. |
| Functions | Description |
|---|
| sqrt() |
Returns the square root of the given number. |
| cbrt() |
Returns the cube root of the given number. |
