- Select a Web Site
- Interpolate set of values. Griddata -> scatteredInterpolant
- TriScatteredInterp
- How to retain duplicate while using ScatteredInterpolant
- Interpolation

## Select a Web Site

Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page. Reload the page to see its updated state. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search Answers Clear Filters. Answers Support MathWorks. Search Support Clear Filters. Support Answers MathWorks. Search MathWorks. MathWorks Answers Support. Open Mobile Search. Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. How to use scatteredInterpolant? Emmanouil Rachoutis on 10 Jun Vote 0. Commented: John D'Errico on 11 Jun Dear all. I am trying to make the plot below look better, and since I don't have enough data for that I would like to use the scatterdInterpolant command. However, what I am using so far does not work. Do you have any ideas? I thank you in advance. Cheers, Manolis.## Interpolate set of values. Griddata -> scatteredInterpolant

Documentation Help Center. Use scatteredInterpolant to perform interpolation on a 2-D or 3-D data set of scattered data. Use griddedInterpolant to perform interpolation with gridded data. Vectors x and y specify the x,y coordinates of the sample points. The rows of P contain the xy or xyz coordinates for the values in v. Specify Method as the last input argument in any of the first three syntaxes. Pass Method and ExtrapolationMethod together as the last two input arguments in any of the first three syntaxes. Method can be: 'nearest''linear'or 'natural'. ExtrapolationMethod can be: 'nearest''linear'or 'none'. Sample points, specified as vectors of the same size as v. The sample points should be unique. However, if the sample points contain duplicates, scatteredInterpolant displays a warning and merges the duplicates into a single point. Sample points array, specified as an m -by- n matrix, where m is the number of points and n is the dimension of the space where the points reside. Each row of P contains the xy or xyz coordinates of a sample point. Linear extrapolation based on boundary gradients. Default when Method is 'linear' or 'natural'. Nearest neighbor extrapolation. This method evaluates to the value of the nearest neighbor on the boundary. Default when Method is 'nearest'. No extrapolation. Any queries outside the convex hull of Points return NaN. Sample points, specified as a matrix. The size of the matrix is m -by- 2 or m -by- 3 to represent m points in 2-D or 3-D space. Each row of Points contains the xy or xyz coordinates of a unique sample point. The rows in Points correspond to the function values in Values. Function values at sample points, specified as a vector of values associated with each point in Points. Interpolation method, specified as 'linear''nearest'or 'natural'. See Method for descriptions of these methods. Extrapolation method, specified as 'nearest''linear'or 'none'. See ExtrapolationMethod for descriptions of these methods. Use scatteredInterpolant to create the interpolantF. Then you can evaluate F at specific points using any of the following syntaxes:. Each row in Pq contains the coordinates of a query point. Use this syntax to conserve memory when you want to query a large grid of points. Define some sample points and calculate the value of a trigonometric function at those locations. These points are the sample values for the interpolant. Evaluate the interpolant at query locations xqyq. Create an interpolant for a set of scattered sample points, then evaluate the interpolant at a set of 3-D query points. Define random points and sample a trigonometric function. Evaluate the interpolant at query locations xqyqzq.

## TriScatteredInterp

Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page. Reload the page to see its updated state. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search Answers Clear Filters. Answers Support MathWorks. Search Support Clear Filters. Support Answers MathWorks. Search MathWorks. MathWorks Answers Support. Open Mobile Search. Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. NAN from griddata for scatteredInterpolant. Matan Zakay on 17 Jun

## How to retain duplicate while using ScatteredInterpolant

Documentation Help Center. TriScatteredInterp is not recommended. Use scatteredInterpolant instead. This can subsequently be initialized with sample data points and values XdataVdata via F. X is a matrix of size mpts -by- ndimwhere mpts is the number of points and ndim is the dimension of the space where the points reside ndim is 2 or 3. The column vector V defines the values at Xwhere the length of V equals mpts. DT is a Delaunay triangulation of the scattered data locations, DT. The matrix DT. V is a column vector that defines the values at DT. Xwhere the length of V equals mpts. The corresponding value at these locations is qz. The Delaunay triangulation of a set of points is a triangulation such that the unique circle circumscribed about each triangle contains no other points in the set. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search Support Support MathWorks. Search MathWorks. Off-Canvas Navigation Menu Toggle. Compatibility Note TriScatteredInterp is not recommended. Input Arguments X Matrix of size mpts -by- ndimwhere mpts is the number of points and ndim is the dimension of the space where the points reside. DT Delaunay triangulation of the scattered data locations method natural Natural neighbor interpolation linear Linear interpolation default nearest Nearest-neighbor interpolation.

## Comments on “Scattered interpolant matlab”