Hi everyone. How can I draw a big heatmaps?
png(foo.png,1,1)
heatmap(x)
dev.off()
where x is a big matrix, say 200*200.
The code above generates a small heatmap in the middle of the png file
and leaves big margins. I expect it to take up more space so that the
labels are not
Hi, everybody
Is there any way to turn off the output message of a function, maybe a
result of cat() or print() command in that function.
I only expected it to be executed quite and return a value. Any
intermediate messages can be omitted.
Thanks!
Ma
Hi, everybody
Is there any way to execute a function, which name is stored in a string.
such as:
a - ls()
foo(a) ## same as ls() itself.
Or, to execute a R command, which is stored in a string
such as:
a - m1 - matrix(1:9,3,3)
foo(a) ## same as the assignment itself
Hi everybody,
I use par(mfrow=c(2,2)) to draw 4 sub figures. The default white space
between columns is a litte large. Is there any parameters to control
it?
Thanks in advance!
Ma
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Hi,
How can I put text in a figure which is not parallel to the axes,such
as along the line x=2y.
It seems that the function 'text' does not have such parameters.
thanks in advance
Ma
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Hi,
How can I generate a random 100x100 correlation matrix, R={r_ij},
where about 10% of r_ij are greater than 0.9
Thanks in advance.
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Hi, everybody. I have a list obj L, sth like
$`aaa`
[1] 5753
if the string 'aaa' is a returned value of a function foo(). what is
the right syntax form of L$foo()
I'm new to R, thanks in advance.
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hi,
I want to do a polynomial regression of y on x of degree 2, as following
x-1:10
y-x^2
lm(y~poly(x,2))
Call:
lm(formula = y ~ poly(x, 2))
Coefficients:
(Intercept) poly(x, 2)1 poly(x, 2)2
38.5099.9122.98
Which is not what i had expected.
If I wrote the
Hi,
I am new to R. Can anyone tell me how to evaluate an expression stored
in a string?
such as:
expr - 3*5
I want to get the result 15.
Thanks in advance.
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Thank you and Sunder!
On Sat, May 2, 2009 at 8:49 PM, ronggui ronggui.hu...@gmail.com wrote:
eval(parse(text=expr))
[1] 15
2009/5/2 Ning Ma pnin...@gmail.com:
Hi,
I am new to R. Can anyone tell me how to evaluate an expression stored
in a string?
such as:
expr - 3*5
I want to get
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