Set this keyword to perform computations using double-precision arithmetic and to return a double-precision result. If sigma is large, (e.g., greater than 10), then the fit will be like a polynomial interpolation. 01), then effectively there is a cubic spline fit.
The amount of “tension” that is applied to the curve. The values of T must be strictly increasing (no duplicate values). .interpolate) Fourier Transforms (scipy.fftpack) Signal Processing (scipy.signal) Linear Algebra (scipy. The vector of abscissa values for which the ordinate is desired. Y should have the same number of elements as X. The vector of ordinate values corresponding to X. The length of a flattened z array is either len(x)len(y) if x and y specify the column and row coordinates or len(z) len(x) len(y) if x and y specify coordinates for each point. If z is a multi-dimensional array, it is flattened before use. Values must be strictly increasing (no duplicate values). The values of the function to interpolate at the data points. Otherwise, single precision will be used, and a single-precision result will be returned. This is a set of three IDL functions, used for the interpolation and approximation of mathematical functions over finite intervals by Chebyshev polynomials. If X, Y, or T are of type double precision, then the computations will be done using double precision, and a double-precision result will be returned. CHEB - Approximation and interpolation using Chebyshev polynomials. Returns the result of the cubic spline interpolation. In IDL, Gridding, a topic closely related to interpolation, is the problem of creating uniformlyspaced planar data from irregularlyspaced data.
The commands below show a typical use of SPLINE: X values of original function: X = Make a quadratic Y = (X- 3)^ 2 Values for interpolated points: T = FINDGEN( 20)/ 10.+ 2 Do the interpolation: Z = SPLINE(X,Y,T) Syntax interpolation methods are available, such as linear, bilinear, cubic, spline, kriging and triangular irregular network (TIN).
Its source code can be found in the file spline.pro in the lib subdirectory of the IDL distribution.
This routine is written in the IDL language. There are two ways to run IMD: (1) using a licensed copy of IDL, and (2) using the free XOP package, which. It accepts single- or double-precision input.
The SPLINE function performs cubic spline interpolation.