Displaying 15 results from an estimated 15 matches for "lathouri06".
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lathouri
2011 Mar 13
3
how to change the margins of a plot area
Dear all,
I am ploting two boxplot of two chemical variables using the format
boxplot(Alkalinity, logAlkalinity, log="y", col=c("lightblue"), lwd=0.6, boxwex=0.3)
However when I plot like this, the distance between the two boxplots is very big and as well the distance of each boxplot from the plot area, left and right. How can I minimise that distance between the boxplots and
2008 Nov 17
3
Time plots
Dear all,
I want to do some time plots and actually the dates are in the format of dd/mm/yyyy. So first I input my dataframe in R in a csv form. What I do is
DF<-read.csv("C:/Documents and Settings/DF.csv")
DATE<-as.Date(DATE, "%d/%m/%Y") # to tell R that DATE column is indeed dates
with(DF, plot(DATE,pH))
Until here it works fine, but I have the graph plotting
2008 Nov 13
1
Boxplots with different variables and different ranges in R
Dear all,
I am trying to make boxplots in one diagram but it is not working. Actually I have a large dataset, around 35 water quality variables with different units and of course in different ranges (some are orders of magnitude bigger than others). I want to produce one diagram with all the boxplots of the variables of my dataset.
I tried these series of commands:
>oldpar <-
2009 Oct 28
2
superscript in ylab
Dear all
I am doing some plots in R.
I want to have as label in y-axis Temperature (oC). I have used ylab=expression(paste({Temperature} ^o*C)) but what I get is TemperatureoC.
How can I have a space between Temperature and the units and also the units to be in brackets?
Many thanks
Maria
[[alternative HTML version deleted]]
2011 Feb 17
2
barplot with errorbars
Dear all
I have six variables of the average metal concentrations
Var1 4.77
Var2 23.5
Var3 5.2
Var4 12.3
Var5 42.1
Var6 121.2
I want to plot them as a barplot with error bars. Could you help me?
Cheers
Maria
[[alternative HTML version deleted]]
2010 Aug 31
2
specify axis range
Dear all,
I want to make a plot where I can specify the range of y axis. I am using the interaction.plot command and because the values of y axis are from 2 to 500, I am using a logarithmic scale.
>interaction.plot(speclong$Date,speclong$time2,speclong$outcome,xaxt="n",type="l",pch=20,xlab="", log="y", ylab="Concentration
2011 Mar 15
3
fitting a distribution to a ecdf plot
Dear all,
I need to plot an cumulative distribution plot of a variable and then to fit a distribution to that, probably a weibull or lognormal.
I have plotted the ecdf as
> plot(ecdf(x))
but I haven't managed to fit the distribution. I have as well attached the data.
I would appreciate if you could help me on that.
Thank you.
Kind regards
Maria
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2008 Nov 12
2
Enquiries about time plots in R
Dear all,
My name is Maria Lathouri and I am currently doing a PhD at Imperial College of London about time series of environmental variables in surface waters. I am trying to do some time plots with R but it seems that it is not working.
The problem is that the time is not regular, for example, a small dataset can be seen below:
Date pH
1/02/1998 5.5
5/03/1998 5
2010 Sep 03
1
change the type of lines and colours in interaction.plot
Dear all,
I want to plot 8 chemical variables in the same plot. I have used the interaction.plot command:
> interaction.plot(speclong$Date,speclong$time2,speclong$outcome,xaxt="n",type="l",pch=20,xlab="", log="y", ylab="Concentration (ug/L)",trace.label="",col=rainbow(8))
However, what it gives me is dotted lines and the colours are
2011 Feb 09
3
add error bars in a plot
Dear all
I have a dataset of how metal concentrations change through time. I have made a plot of date versus metal concentration. However I want to add error bars in the plot.
Could you help me?
Thanks
Maria
[[alternative HTML version deleted]]
2011 Mar 02
0
please help with interaction.plot
Dear all
I have the following code to produce a graph of 5 different variables in the same graph; however when I follow it in the end it produces the plot of the 5 variables and a legend in right but the problem is that the legend is too close to the margin of the plot and when I try to write the text for each line it does not fit. How can I change the location of the legend to be placed a little
2009 Sep 28
2
Trendline and R square value
Hi
I would like to display the trendline and the R-square value in a xy scatter in R. For example if I want to plot f vs g I add the trendline using the commands below
>library(quantreg)
>plot(f,g)
>abline(rq(g~f))
however I don't know how to display the R2 in the graph.
Thank you in advance.
Kind regards
Maria
[[alternative HTML version deleted]]
2009 Oct 13
1
plot dates in x-axis
Hallo,
I am trying to plot dates in x-axis. The format of my dates are in dd/mm/yyyy. At first I install zoo package. After R reads my file, I change the default format of dates to the format that I have,
>myfile<-read.csv
>DATE<-as.Date(DATE,format="%d/%m/%Y")
up till now everything goes ok; when however I go and plot for example
>plot(DATE, Discharge)
in the x-axis I
2012 Jan 04
0
interaction plot and x axis
Dear all
I am trying to make an interaction plot among 6 variables; e.g. PH to be in the x axis and the rest 5 variables in the y axis. The code that I am using is the below:
The name of my file is e.g. spec so
> spec<-read.csv("spec.csv")
>head (spec)
>str(spec)
>names<-names(spec)[2:6]
>speclong <- reshape(spec, idvar = "id", varying =
2011 Feb 08
2
please help-DTK package
Dear all
I am trying to do a multiple pairwise comparison test with Tukey-Kramer test as I have unequal sample sizes and variance. I have downloaded the DTK package from CRAN website in my computer for Windows, however I have difficulties in installing it in R.
I have unzipped the compressed file in my computer and then I open R, I try to install the package through File - Source R code - DTK