gscatter函数介绍

gscatter函数介绍 2016年12月26日 星期一
22:31 Syntax
gscatter(x,y,group)
gscatter(x,y,group,clr,sym,siz)
gscatter(x,y,group,clr,sym,siz,doleg)
gscatter(x,y,group,clr,sym,siz,doleg,xnam,ynam)
h = gscatter(…)
Description
gscatter(x,y,group)  creates a scatter plot of  x  and  y, grouped by  group.  x  and  y  are vectors of the same size.  group  is a grouping variable in the form of a categorical variable, vector, string array, or cell array of strings. Alternatively,  group  can be a cell array containing several grouping variables (such as  {g1 g2 g3}), in which case observations are in the same group if they have common values of all grouping variables. Points in the same group and appear on the graph with the same marker and color.
gscatter(x,y,group,clr,sym,siz)  specifies the color, marker type, and size for each group.  clr  is either a string array of colors recognized by the  plot  function or a three-column matrix of color specifications.  sym  is a string array of symbols recognized by the  plot  command, with the default value  ’.’.  siz  is a vector of sizes, with the default determined by the  ’DefaultLineMarkerSize’  property. If you do not specify enough values for all groups,  gscatter  cycles through the specified values as needed.
gscatter(x,y,group,clr,sym,siz,doleg)  controls whether a legend is displayed on the graph (doleg  is  ’on’, the default) or not (doleg  is  ’off’).
gscatter(x,y,group,clr,sym,siz,doleg,xnam,ynam)  specifies the name to use for the  x-axis and  y-axis labels. If the  x  and  y  inputs are simple variable names and  xnamand  ynam  are omitted,  gscatter  labels the axes with the variable names.
h = gscatter(…)  returns an array of handles to the lines on the graph.
Examples
collapse all
Scatter Plot of Climate and Housing Ratings
Load the sample data.
load discrim
The sample data contains ratings of cities according to nine factors such as climate, housing, education, and health in the matrix  ratings  .
Plot the relationship between the ratings for climate (first column) and housing (second column) grouped by city size in the matrix  group. Choose different colors and plotting symbols for each group.
figure;
gscatter(ratings(:,1),ratings(:,2),group,’br’,’xo’)
xlabel(‘climate’);
ylabel(‘housing’);
  

     
已使用 Microsoft OneNote 2016 创建。