Curve Fitting Toolbox

datastats

Return descriptive statistics about the data

Syntax

• xds = datastats(xdata)
  [xds,yds] = datastats(xdata,ydata)
  

Arguments

xdata	A column vector of predictor data.
ydata	A column vector of response data.
xds	A structure containing descriptive statistics for xdata.
yds	A structure containing descriptive statistics for ydata.

Description

xds = datastats(xdata) returns statistics for xdata to the structure xds. The structure contains the fields shown below.

Field	Description
num	The number of data values
max	The maximum data value
min	The minimum data value
mean	The mean value of the data
median	The median value of the data
range	The range of the data
std	The standard deviation of the data

[xds,yds] = datastats(xdata,ydata) returns statistics for xdata and ydata to the structures xds and yds, respectively. xds and yds contain the fields shown above. xdata and ydata are column vectors of the same size.

Remarks

If xdata or ydata contains complex values, only the real part of the value is used in the statistics computations. If the data contains Infs or NaNs, they are processed using the usual MATLAB rules.

Example

Return data statistics for the census data.

• load census
  [xds,yds] = datastats(cdate,pop)
  
  xds = 
  
         num: 21
         max: 1990
         min: 1790
        mean: 1890
      median: 1890
       range: 200
         std: 62.048
  
  yds = 
  
         num: 21
         max: 248.7
         min: 3.9
        mean: 85.729
      median: 62.9
       range: 244.8
         std: 78.601
  

confint

differentiate