[R] plot 2 graphs on the same x-y plane
hi, I'm doing some data on least square curve fitting. What I like to have is to compare the scatter plot whilst having the fitting curve on the same coordinates. Any suggestting command besides plot(x,y). TaweeMac OSX 10.7.3 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] plot 2 graphs on the same x-y plane
This is the same malformatted message you posted on R-SIG-Mac even after David specifically asked for clarification not to reward bad behavior, but perhaps this will enlighten: # Minimal reproducible data! x - runif(15, 0, 5) y - 3*x - 2 + runif(15) dat - data.frame(x = x, y = y) rm(list = c(x, y)) # Base graphics plot using the formula interface plot(y ~ x, data = dat) abline(lm(y~x, data = dat), col = red3, lwd = 2) Alternatively library(ggplot2) ggplot(dat, aes(x = x, y = y)) + geom_point() + stat_smooth(method = lm, color = I(red3)) which is perhaps overkill in this situation. Michael On Tue, Apr 10, 2012 at 11:03 PM, Tawee Laoitichote ohowow2...@hotmail.com wrote: hi, I'm doing some data on least square curve fitting. What I like to have is to compare the scatter plot whilst having the fitting curve on the same coordinates. Any suggestting command besides plot(x,y). TaweeMac OSX 10.7.3 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] plot 2 graphs on the same x-y plane
Dear Michael (and Davis), Your answer is not what I want to know. My question is to find any command to plot the data I got from the field; such as a set of (x,y) data ( I actually have these data) and together withe the derived ones . I brought these data to plot on x-y plane, getting a graph showing some relation. Then, I wanted to find some linear relation, I would use least square method to solve having a simple function such as; y = ax + b, solving the a and b. So, I could plot a straight line using this function, or perhaps forecast some data of y which I know the value x. My problem is when I did a scatter plot by command plot(x,y), I got a graph. Whilst I plotted another graph using the above function the existing graph disappeared replaced be the latter function. Unfortunately, after searching a while to find the solution command, I can not find the command. I asked the question as to request some help not the example you shown. Any way, thanks for you effort. Ta! wee Mac OS10.7.3 From: michael.weyla...@gmail.com Date: Tue, 10 Apr 2012 23:31:08 -0400 Subject: Re: [R] plot 2 graphs on the same x-y plane To: ohowow2...@hotmail.com CC: r-help@r-project.org This is the same malformatted message you posted on R-SIG-Mac even after David specifically asked for clarification not to reward bad behavior, but perhaps this will enlighten: # Minimal reproducible data! x - runif(15, 0, 5) y - 3*x - 2 + runif(15) dat - data.frame(x = x, y = y) rm(list = c(x, y)) # Base graphics plot using the formula interface plot(y ~ x, data = dat) abline(lm(y~x, data = dat), col = red3, lwd = 2) Alternatively library(ggplot2) ggplot(dat, aes(x = x, y = y)) + geom_point() + stat_smooth(method = lm, color = I(red3)) which is perhaps overkill in this situation. Michael On Tue, Apr 10, 2012 at 11:03 PM, Tawee Laoitichote ohowow2...@hotmail.com wrote: hi, I'm doing some data on least square curve fitting. What I like to have is to compare the scatter plot whilst having the fitting curve on the same coordinates. Any suggestting command besides plot(x,y). TaweeMac OSX 10.7.3 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] plot 2 graphs on the same x-y plane
You were told before this isn't a Mac question so please don't cc R-SIG-Mac. I'm not sure what this bit of your reply means My question is to find any command to plot the data I got from the field; but your reply later suggests that your problem is that you are overriding previous plots on a given device. By default, plot() does this -- if you want to add elements, you need to use points() or lines() (or some function that calls those, like abline() as I demonstrated) E.g., # Removes first plot plot(1:20) plot(0:19, col = 2) # Adds to plot plot(1:20) points(0:19, col = 2) Michael 2012/4/10 Tawee Laoitichote ohowow2...@hotmail.com: Dear Michael (and Davis), Your answer is not what I want to know. My question is to find any command to plot the data I got from the field; such as a set of (x,y) data ( I actually have these data) and together withe the derived ones . I brought these data to plot on x-y plane, getting a graph showing some relation. Then, I wanted to find some linear relation, I would use least square method to solve having a simple function such as; y = ax + b, solving the a and b. So, I could plot a straight line using this function, or perhaps forecast some data of y which I know the value x. My problem is when I did a scatter plot by command plot(x,y), I got a graph. Whilst I plotted another graph using the above function the existing graph disappeared replaced be the latter function. Unfortunately, after searching a while to find the solution command, I can not find the command. I asked the question as to request some help not the example you shown. Any way, thanks for you effort. Tawee Mac OS10.7.3 From: michael.weyla...@gmail.com Date: Tue, 10 Apr 2012 23:31:08 -0400 Subject: Re: [R] plot 2 graphs on the same x-y plane To: ohowow2...@hotmail.com CC: r-help@r-project.org This is the same malformatted message you posted on R-SIG-Mac even after David specifically asked for clarification not to reward bad behavior, but perhaps this will enlighten: # Minimal reproducible data! x - runif(15, 0, 5) y - 3*x - 2 + runif(15) dat - data.frame(x = x, y = y) rm(list = c(x, y)) # Base graphics plot using the formula interface plot(y ~ x, data = dat) abline(lm(y~x, data = dat), col = red3, lwd = 2) Alternatively library(ggplot2) ggplot(dat, aes(x = x, y = y)) + geom_point() + stat_smooth(method = lm, color = I(red3)) which is perhaps overkill in this situation. Michael On Tue, Apr 10, 2012 at 11:03 PM, Tawee Laoitichote ohowow2...@hotmail.com wrote: hi, I'm doing some data on least square curve fitting. What I like to have is to compare the scatter plot whilst having the fitting curve on the same coordinates. Any suggestting command besides plot(x,y). TaweeMac OSX 10.7.3 [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
