help contour
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Title

     Produces a contour plot


Syntax

        contour [varlist] [, options]

    options               Description
    -------------------------------------------------------------------------
    Main
      split{numlist}       specifies the values for the contours and takes a
                            number list, the default is 3 contours at the
                            mean, 25th and 75th percentiles.
      values               specifies that the data points be plotted
                            alongside the contours.
      twoway_options       specifies options for example titles and labels.
    -------------------------------------------------------------------------

Description

    contour draws a contour plot for a variable list on the x-axis and the
    observations on the y-axis.

Options

        +------+
    ----+ Main +-------------------------------------------------------------

    split{numlist} specifies the values for the contours and takes a number
        list, the default is 3 contours at the mean, 25th and 75th
        percentiles.

    values specifies that the data points be plotted alongside the contours.


Examples

Click the following commands in order. 
 
clear

set obs 8

gen x1=uniform()
gen x2=uniform()
gen x3=uniform()
gen x4=uniform()

contour x1-x4
contour x1-x4, ylabel(,angle(0)) title(contours) split(0.5) 

Also see

Online:  
twoway