I have the following code but the y and x intercepts do not intersect, how can I get them to do so? #3 Simple Scatterplot DV VS Pred (pop pred) FOR D-METHYLPHN pda<- ggplot(newd, aes(x=PRED,y=DV )) + geom_point() +geom_abline (intercept=0, slope=1,linetype=1,size=2) + theme(text=element_text(siz…

Are you wanting the x and y axis to each begin at zero? If yes, you can control the x and y scales with the scale_x_continuous and scale_y_continuous functions. The limits argument let's you control the axis or scale values, and you can use NA to use an existing value. I used the mtcars data set to…

When I used the code I got an error: could not find function”scale_continuous” but it did produce a graph with a small off set of both zero values. The resulting graph did not have 0,0 zero intercept. When I tried scale_y_continuous(limits=c(0,NA))+ scale_x_continuous(limits=c(0,NA)) I got the…

I am including the type of graph that I got with the continuous code. I was curious as to why I got the graph although I received an error message for both versions of the code? [image]

Sorry, typo in my example code -- my bad. The scale_continuous() should have been scale_y_continuous(). I think the plot was still created because R can be smart that way? If you type ?scale_x_continuous in your console you'll see the expand argument. If you set that to zeros it will force the 0 int…

I made the change but I got this error. Not sure what to do since I tried the code with and without the , and I get the same error. Error: unexpected ',' in "scale_y_continuous(limits=c(0,NA)) ," scale_x_continuous(limits=c(0,NA)) expand=c(0,0) Error: unexpected symbol in " scale_x_continuou…

You need the comma to separate the arguments to the function -- in the example single lines of code you pasted you have an extra bracket in the middle of the function and you are missing a closing bracket, that would be enough to generate your errors. R is plotting the object pda generated from the …

A more concise expression would be: expand_limits(x = 0, y = 0) This replaces the scale_x/y_continuous functions.

I used the following code as suggested and there were no errors, however the plot still had the 0 values off set with x=0.0 while y=0 see attached graph: #3 Simple Scatterplot DV VS Pred (pop pred) FOR D-METHYLPHN pda<- ggplot(newd, aes(x=PRED,y=DV )) + geom_point() +geom_abline (intercept=0, sl…

I got another suggestion to use expand_limits (x=0,y=0) which I tried with the same result except there was no error message. I sent this response back to the individual for further clarification. #3 Simple Scatterplot DV VS Pred (pop pred) FOR D-METHYLPHN pda<- ggplot(newd, aes(x=PRED,y=DV )) …

In the code you provided: pda<- ggplot(newd, aes(x=PRED,y=DV )) + geom_point() +geom_abline (intercept=0, slope=1,linetype=1,size=2) + theme(text=element_text(size=10)) expand_limits (x=0, y=0) you do not have a + between the call of theme and the expand_limits call, which is on a separate line. …

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How to obtain y=0 and x=0 for a scatter plot

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