Question

Which parameter decides the line type & plot symbol respectively?

Answer 1

what is a balanced diet? name the nutrients which should be included in the diet of (a) 12 year old children (b) sportsmen (c) 65 year old grandmother

Answer 2

Answer:

     The R programming language is very useful for creating plots. This is because it has many built-in plotting functions. The R users have higher control to bring about their desired graphic.

     The “plot()” command is the most important and most generic command used for drawing plots.

     This command takes in many arguments out of which what we are concerned is the argument used for line type and plot symbol.  The plot if defined as line, we need to add the argument “type” whose value will be “l”.  If we choose this, the default line plot is solid lines. But if we want to define the type of line , then we need to use additional argument called “lty”.

For example

plot(x, y, type = l, lty = dashed)

This means the plot will be a dashed line plot.

Other values for lty are

•        dotted

•        dotdash

•        longdash

•        twodash

The pch argument is used to decide the plot symbol.  We can provide give values to the argument like pch=21 which is for a circle, pch=22 is for a square. You can specify your own symbols.

For drawing a scatter plot of filled circles, the command would be

plot(x, y, type = p, pch = 19)