This is documentation for an old release of NumPy (version 1.5.). Read this page Search for this page in the documentation of the latest stable release (version > 1.17).
Mathematical functions
Trigonometric functions
| sin() |
Trigonometric sine, element-wise. |
| cos() |
Cosine elementwise. |
| tan() |
Compute tangent element-wise. |
| arcsin() |
Inverse sine, element-wise. |
| arccos() |
Trigonometric inverse cosine, element-wise. |
| arctan() |
Trigonometric inverse tangent, element-wise. |
| hypot(x1) |
Given the “legs” of a right triangle, return its hypotenuse. |
| arctan2(x1) |
Element-wise arc tangent of x1/x2 choosing the quadrant correctly. |
| degrees() |
Convert angles from radians to degrees. |
| radians() |
Convert angles from degrees to radians. |
| unwrap(p[, discont, axis]) |
Unwrap by changing deltas between values to 2*pi complement. |
| deg2rad() |
Convert angles from degrees to radians. |
| rad2deg() |
Convert angles from radians to degrees. |
Hyperbolic functions
| sinh() |
Hyperbolic sine, element-wise. |
| cosh() |
Hyperbolic cosine, element-wise. |
| tanh() |
Compute hyperbolic tangent element-wise. |
| arcsinh() |
Inverse hyperbolic sine elementwise. |
| arccosh() |
Inverse hyperbolic cosine, elementwise. |
| arctanh() |
Inverse hyperbolic tangent elementwise. |
Rounding
| around(a[, decimals, out]) |
Evenly round to the given number of decimals. |
| round_(a[, decimals, out]) |
Round an array to the given number of decimals. |
| rint() |
Round elements of the array to the nearest integer. |
| fix(x[, y]) |
Round to nearest integer towards zero. |
| floor() |
Return the floor of the input, element-wise. |
| ceil() |
Return the ceiling of the input, element-wise. |
| trunc() |
Return the truncated value of the input, element-wise. |
Sums, products, differences
| prod(a[, axis, dtype, out]) |
Return the product of array elements over a given axis. |
| sum(a[, axis, dtype, out]) |
Sum of array elements over a given axis. |
| nansum(a[, axis]) |
Return the sum of array elements over a given axis treating |
| cumprod(a[, axis, dtype, out]) |
Return the cumulative product of elements along a given axis. |
| cumsum(a[, axis, dtype, out]) |
Return the cumulative sum of the elements along a given axis. |
| diff(a[, n, axis]) |
Calculate the n-th order discrete difference along given axis. |
| ediff1d(ary[, to_end, to_begin]) |
The differences between consecutive elements of an array. |
| gradient(f, *varargs) |
Return the gradient of an N-dimensional array. |
| cross(a, b[, axisa, axisb, axisc, axis]) |
Return the cross product of two (arrays of) vectors. |
| trapz(y[, x, dx, axis]) |
Integrate along the given axis using the composite trapezoidal rule. |
Exponents and logarithms
| exp() |
Calculate the exponential of all elements in the input array. |
| expm1() |
Calculate exp(x) - 1 for all elements in the array. |
| exp2() |
Calculate 2**p for all p in the input array. |
| log() |
Natural logarithm, element-wise. |
| log10() |
Return the base 10 logarithm of the input array, element-wise. |
| log2() |
Base-2 logarithm of x. |
| log1p() |
Return the natural logarithm of one plus the input array, element-wise. |
| logaddexp(x1) |
Logarithm of the sum of exponentiations of the inputs. |
| logaddexp2(x1) |
Logarithm of the sum of exponentiations of the inputs in base-2. |
Other special functions
| i0(x) |
Modified Bessel function of the first kind, order 0. |
| sinc(x) |
Return the sinc function. |
Floating point routines
| signbit() |
Returns element-wise True where signbit is set (less than zero). |
| copysign(x1) |
Change the sign of x1 to that of x2, element-wise. |
| frexp(out1) |
Split the number, x, into a normalized fraction (y1) and exponent (y2) |
| ldexp(x1) |
Compute y = x1 * 2**x2. |
Arithmetic operations
| add(x1) |
Add arguments element-wise. |
| reciprocal() |
Return the reciprocal of the argument, element-wise. |
| negative() |
Returns an array with the negative of each element of the original array. |
| multiply(x1) |
Multiply arguments element-wise. |
| divide(x1) |
Divide arguments element-wise. |
| power(x1) |
First array elements raised to powers from second array, element-wise. |
| subtract(x1) |
Subtract arguments, element-wise. |
| true_divide(x1) |
Returns a true division of the inputs, element-wise. |
| floor_divide(x1) |
Return the largest integer smaller or equal to the division of the inputs. |
| fmod(x1) |
Return the element-wise remainder of division. |
| mod(x1) |
Return element-wise remainder of division. |
| modf(out1) |
Return the fractional and integral parts of an array, element-wise. |
| remainder(x1) |
Return element-wise remainder of division. |
Handling complex numbers
| angle(z[, deg]) |
Return the angle of the complex argument. |
| real(val) |
Return the real part of the elements of the array. |
| imag(val) |
Return the imaginary part of the elements of the array. |
| conj() |
Return the complex conjugate, element-wise. |
Miscellaneous
| convolve(a, v[, mode]) |
Returns the discrete, linear convolution of two one-dimensional sequences. |
| clip(a, a_min, a_max[, out]) |
Clip (limit) the values in an array. |
| sqrt() |
Return the positive square-root of an array, element-wise. |
| square() |
Return the element-wise square of the input. |
| absolute() |
Calculate the absolute value element-wise. |
| fabs() |
Compute the absolute values elementwise. |
| sign() |
Returns an element-wise indication of the sign of a number. |
| maximum(x1) |
Element-wise maximum of array elements. |
| minimum(x1) |
Element-wise minimum of array elements. |
| nan_to_num(x) |
Replace nan with zero and inf with finite numbers. |
| real_if_close(a[, tol]) |
If complex input returns a real array if complex parts are close to zero. |
| interp(x, xp, fp[, left, right]) |
One-dimensional linear interpolation. |
