[R] plot only partial plots
Monica Palaseanu-Lovejoy
monica.palaseanu-lovejoy at stud.man.ac.uk
Wed Sep 3 20:21:23 CEST 2003
Hi everybody,
I would like to plot only a part of a data frame, and identify the
IDs for all the points with values higher than a certain value. I
will try to be more explicit:
I did a qqnorm plot of my data. It is obvious from the plot that
all the sample quantiles which are in Theoretical Quantiles = or >
than 1 belong to another group. To be sure about that I plot the
cooks.distance for the same data, and sure enough the data with
the indices grater than 250 (x axis) have obvious higher Cook ‘s
distance than the majority of the data. The data indices on the
Cook’s distance plot are different than my data ID (in my data
table) which is “character type”. How do I identify the IDs of the
data I am interested into, and how I can plot only the data with
Theoretical Quantiles equal or grater than 1?
And, of course, how can I plot only the Cook’s distance for the
data with indices higher than a certain number, or Cook’s
distance higher than a certain number????
And, on the same line, how can I sort a tab-delimited table after
the values from one column? I know how to assign one column
to a vector and sort that vector, but what if I want to sort the
whole table, like in Excel for example?
Thank you in advance for all your time and answers,
Monica
Monica Palaseanu-Lovejoy
University of Manchester
School of Geography
Mansfield Cooper Building
Oxford Road, Manchester
M13 9PL, UK.
email: monica.palaseanu-lovejoy at stud.man.ac.uk
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