No that isn't it I'm afraid - my expression is pasted together from various bits and pieces and is at some stage a string variable. I needed parse as Brian pointed out....
Thanks anyway, Steve. From: "Petr Pikal" <[EMAIL PROTECTED]> To: "Steve Roberts" <[EMAIL PROTECTED]> Date sent: Thu, 10 Jun 2004 13:44:21 +0200 Subject: Re: [R] Help with plotmath Copies to: [EMAIL PROTECTED] Priority: normal > Hi > > On 10 Jun 2004 at 12:28, Steve Roberts wrote: > > > There must be a simple answer. I want to plot an expression, > > where the expression is held in a string variable. The "obvious" > > solution along the lines of > > > > ex<-"x^2" > > plot( c(0,1), c(0,1), main=as.expression(ex) ) > > Plotmath example led me to > > ex<-expression(x^2) > plot( c(0,1), c(0,1), main=(ex) ) > > hope it is what you want. > > Cheers > Petr > > > > > > gives me the a title x^2 - ie doesn't treat it like an expression. I > > suspect I don't understand expressions properly. For the real problem > > I do need to have my expression string in a variable as it is > > data-dependent. > > > > Can someone tell me the magic words? > > > > Steve > > Dr Steve Roberts > > [EMAIL PROTECTED] > > > > Senior Lecturer in Medical Statistics, > > CMMCH NHS Trust and University of Manchester Biostatistics Group, 0161 > > 275 5192 / 0161 276 5785 > > > > ______________________________________________ > > [EMAIL PROTECTED] mailing list > > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html > > Petr Pikal > [EMAIL PROTECTED] > > Dr Steve Roberts [EMAIL PROTECTED] Senior Lecturer in Medical Statistics, CMMCH NHS Trust and University of Manchester Biostatistics Group, 0161 275 5192 / 0161 276 5785 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
