R help - Sep 2012 - cex.lab ignored in plot.zoo for multiple plots

Hello everyone,

a problem with the plot.zoo function. In the parameters of the function,
cex.lab is ignored. I tried to reduce the size of the yaxis labels by at
least 50%.

------------------

Example:

sample <- as.zoo(EuStockMarkets)

par(las=1)

plot.zoo(sample, plot.type="multiple", main="Time Series",
xlab="Date",
yaxt="n", cex.lab=0.5, xaxs="i")
# Try playing with different values for cex.lab

par(las=0)

---------------

Any hints or suggestions?

THX Nico

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On Sep 5, 2012, at 8:06 AM, Nicolai Schneider wrote:
> Hello everyone,
> 
> a problem with the plot.zoo function. In the parameters of the function,
> cex.lab is ignored. I tried to reduce the size of the yaxis labels by at
> least 50%.
> 
> ------------------
> 
> Example:
> 
> sample <- as.zoo(EuStockMarkets)
> 
> par(las=1)
> 
> plot.zoo(sample, plot.type="multiple", main="Time
Series", xlab="Date",
> yaxt="n", cex.lab=0.5, xaxs="i")
> # Try playing with different values for cex.lab
I would have thought that the parameter to use would be 'cex.axis'.
Testing seems to confirm theory in this case.
> 
> par(las=0)
> 
> ---------------
-- 
David Winsemius, MD
Alameda, CA, USA

On Wed, Sep 5, 2012 at 11:06 AM, Nicolai Schneider
<rstatistics.user at gmail.com> wrote:
> Hello everyone,
>
> a problem with the plot.zoo function. In the parameters of the function,
> cex.lab is ignored. I tried to reduce the size of the yaxis labels by at
> least 50%.
>
> ------------------
>
> Example:
>
> sample <- as.zoo(EuStockMarkets)
>
> par(las=1)
>
> plot.zoo(sample, plot.type="multiple", main="Time
Series", xlab="Date",
> yaxt="n", cex.lab=0.5, xaxs="i")
> # Try playing with different values for cex.lab
>
> par(las=0)
>
Internally it uses mtext to write that text and mtext uses cex which
is already taken.  Here is a workaround:

library(proto)
p <- proto(plot.zoo = plot.zoo, mtext = function(...)
graphics::mtext(..., cex = .5))
with(p, plot.zoo)(sample)

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