Plotting questions
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I have several plotting questions. The whole purpose of this is to look at regression scatterplots for outlier values. So I want to see the scatterplot plus the regression line.
What I've got is 3 vars by 6 vars. In graph, the command would be, for instance, Graph scatterplot(matrix) x1 x2 y1 y2. So that isn't quite what I'd like because it give me a 4x4 set of plots. It'd be much better if I could get a 2x2 plot set. I had thought that Graph scatterplot(matrix) x1 x2 with y1 y2. Would work, but no, it won't. But maybe I didn't know how to do things. Is there a way? Oh, yeah, and I have to edit the plot to add the regression line. I think there is a command to add a regression line but I didn't see it documented. Is it? What is it? It seems that spss has a fixed "frame" size (which is probably not the right word) for the plot itself, regardless of whether the plot is x1 with y1 or x1 x2 y1 y2. Oh, yes, I'll bet the answer is NO, but can the frame size manipulated? If you're screening scatterplots and you have, just saying, a 3 by 6 matrix of variables, it'd be oh so very nice to make the frame taller so the plots don't look like your little fingernail. NOW, let's switch over to GGraph. Courtesy of ViAnn and, I think, Marta, I can use ggraph to plot a 3x2 (x1 x2 x3 with y1 y2) and put regression lines on the plots although a database restructure is required. Again the frame size question applies because I'd like to make the framesize taller to plot more than 3x2. So, can the frame size be manipulated in ggraph? Thanks, Gene Maguin ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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Maybe the Graphs > Regression Variable
Plots extension command (STATS REGRES PLOT) would do what you want. It
will give you a set of plots of one or more dependent variables against
a list of predictors (categorical or continuous), and it can include various
types of fit lines).
This command is in the Python Essentials for V21, but it can be downloaded from the SPSS Community site for earlier versions. Jon Peck (no "h") aka Kim Senior Software Engineer, IBM [hidden email] new phone: 720-342-5621 From: "Maguin, Eugene" <[hidden email]> To: [hidden email], Date: 02/08/2013 01:45 PM Subject: [SPSSX-L] Plotting questions Sent by: "SPSSX(r) Discussion" <[hidden email]> I have several plotting questions. The whole purpose of this is to look at regression scatterplots for outlier values. So I want to see the scatterplot plus the regression line. What I've got is 3 vars by 6 vars. In graph, the command would be, for instance, Graph scatterplot(matrix) x1 x2 y1 y2. So that isn't quite what I'd like because it give me a 4x4 set of plots. It'd be much better if I could get a 2x2 plot set. I had thought that Graph scatterplot(matrix) x1 x2 with y1 y2. Would work, but no, it won't. But maybe I didn't know how to do things. Is there a way? Oh, yeah, and I have to edit the plot to add the regression line. I think there is a command to add a regression line but I didn't see it documented. Is it? What is it? It seems that spss has a fixed "frame" size (which is probably not the right word) for the plot itself, regardless of whether the plot is x1 with y1 or x1 x2 y1 y2. Oh, yes, I'll bet the answer is NO, but can the frame size manipulated? If you're screening scatterplots and you have, just saying, a 3 by 6 matrix of variables, it'd be oh so very nice to make the frame taller so the plots don't look like your little fingernail. NOW, let's switch over to GGraph. Courtesy of ViAnn and, I think, Marta, I can use ggraph to plot a 3x2 (x1 x2 x3 with y1 y2) and put regression lines on the plots although a database restructure is required. Again the frame size question applies because I'd like to make the framesize taller to plot more than 3x2. So, can the frame size be manipulated in ggraph? Thanks, Gene Maguin ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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To get back to Gene’s original question, the frame size can be manipulated in ggraph via GPL. You can use the scale() function on a GRAPH statement and a PAGE statement. Scale takes either a percentage or a value specified in pixels, inches, or centimeters. I’m a bit confused about 2 x’s and 2 y’s and translating this into 3 vars by 6 vars and am not going to wrap my head around this right now. Note that you can layout multiple graphs within a “page” with the GRAPH: begin() function. From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Jon K Peck Maybe the Graphs > Regression Variable Plots extension command (STATS REGRES PLOT) would do what you want. It will give you a set of plots of one or more dependent variables against a list of predictors (categorical or continuous), and it can include various types of fit lines).
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The extension command I mentioned gives
you control over the size as well as number of plots per row. It
has some other bells and whistles, too. It does all this, by the
way, by generating the GPL specifying all the plots. If you look
at that generated GPL, you will likely agree that you wouldn't want to
write it by hand.
Jon Peck (no "h") aka Kim Senior Software Engineer, IBM [hidden email] new phone: 720-342-5621 From: ViAnn Beadle <[hidden email]> To: [hidden email], Date: 02/08/2013 02:19 PM Subject: Re: [SPSSX-L] Plotting questions Sent by: "SPSSX(r) Discussion" <[hidden email]> To get back to Gene’s original question, the frame size can be manipulated in ggraph via GPL. You can use the scale() function on a GRAPH statement and a PAGE statement. Scale takes either a percentage or a value specified in pixels, inches, or centimeters. I’m a bit confused about 2 x’s and 2 y’s and translating this into 3 vars by 6 vars and am not going to wrap my head around this right now. Note that you can layout multiple graphs within a “page” with the GRAPH: begin() function. From: SPSSX(r) Discussion [[hidden email]] On Behalf Of Jon K Peck Sent: Friday, February 08, 2013 1:51 PM To: [hidden email] Subject: Re: Plotting questions Maybe the Graphs > Regression Variable Plots extension command (STATS REGRES PLOT) would do what you want. It will give you a set of plots of one or more dependent variables against a list of predictors (categorical or continuous), and it can include various types of fit lines). This command is in the Python Essentials for V21, but it can be downloaded from the SPSS Community site for earlier versions. Jon Peck (no "h") aka Kim Senior Software Engineer, IBM peck@... new phone: 720-342-5621 From: "Maguin, Eugene" <emaguin@...> To: [hidden email], Date: 02/08/2013 01:45 PM Subject: [SPSSX-L] Plotting questions Sent by: "SPSSX(r) Discussion" <[hidden email]> I have several plotting questions. The whole purpose of this is to look at regression scatterplots for outlier values. So I want to see the scatterplot plus the regression line. What I've got is 3 vars by 6 vars. In graph, the command would be, for instance, Graph scatterplot(matrix) x1 x2 y1 y2. So that isn't quite what I'd like because it give me a 4x4 set of plots. It'd be much better if I could get a 2x2 plot set. I had thought that Graph scatterplot(matrix) x1 x2 with y1 y2. Would work, but no, it won't. But maybe I didn't know how to do things. Is there a way? Oh, yeah, and I have to edit the plot to add the regression line. I think there is a command to add a regression line but I didn't see it documented. Is it? What is it? It seems that spss has a fixed "frame" size (which is probably not the right word) for the plot itself, regardless of whether the plot is x1 with y1 or x1 x2 y1 y2. Oh, yes, I'll bet the answer is NO, but can the frame size manipulated? If you're screening scatterplots and you have, just saying, a 3 by 6 matrix of variables, it'd be oh so very nice to make the frame taller so the plots don't look like your little fingernail. NOW, let's switch over to GGraph. Courtesy of ViAnn and, I think, Marta, I can use ggraph to plot a 3x2 (x1 x2 x3 with y1 y2) and put regression lines on the plots although a database restructure is required. Again the frame size question applies because I'd like to make the framesize taller to plot more than 3x2. So, can the frame size be manipulated in ggraph? Thanks, Gene Maguin ===================== To manage your subscription to SPSSX-L, send a message to LISTSERV@... (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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Oh Jon, I’ll bet that is just so true. Thanks. Gene Maguin From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Jon K Peck The extension command I mentioned gives you control over the size as well as number of plots per row. It has some other bells and whistles, too. It does all this, by the way, by generating the GPL specifying all the plots. If you look at that generated GPL, you will likely agree that you wouldn't want to write it by hand.
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In reply to this post by Maguin, Eugene
This is confusing what you want, and as always it would be helpful to provide an example data set and the plots showing your problem.
What do you mean by "Frame Size" exactly? There are three possible interpretations I can think of; - A) The range of the x and y axis that define the plotting area. That is the literal black outline around a scatterplot. - B) The scale of the chart that takes up the graphic in the output viewer (this is what Jon and ViAnn refer to.) That is does "scatterplot 1" take up 10 - 40% of the x-area and 10-80% of the y-area in the graphic, and "scatterplot 2" take up the x-area 50 - 90% of the graphic and 10-80% of the y-area. - C) The actual size of the entire graphic in the output viewer. Without knowing which one is the problem, I can't give you useful advice (because the advice for all 3 would be different!) Specifically, fixing C) can't be done in GGRAPH, but needs to be done in the chart template (which is a pretty simple fix actually). A) Is a problem that has to do with the scaling of the different variables (e.g. x1 has a range 0 - 100 and x2 has a range 1,000 to 20,000) and has no obvious solution but several potential ones (which may or may not involve manipulating B). |
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The extension command I mentioned can control
the absolute size of the entire plot, dividing up the area into the individual
small plots according to the specification of the number of plots per row.
the GPL PAGE statement controls the overall plot size while the GRAPH
statement apportions the space within the page.
Jon Peck (no "h") aka Kim Senior Software Engineer, IBM [hidden email] new phone: 720-342-5621 From: Andy W <[hidden email]> To: [hidden email], Date: 02/10/2013 06:54 AM Subject: Re: [SPSSX-L] Plotting questions Sent by: "SPSSX(r) Discussion" <[hidden email]> This is confusing what you want, and as always it would be helpful to provide an example data set and the plots showing your problem. What do you mean by "Frame Size" exactly? There are three possible interpretations I can think of; - A) The range of the x and y axis that define the plotting area. That is the literal black outline around a scatterplot. - B) The scale of the chart that takes up the graphic in the output viewer (this is what Jon and ViAnn refer to.) That is does "scatterplot 1" take up 10 - 40% of the x-area and 10-80% of the y-area in the graphic, and "scatterplot 2" take up the x-area 50 - 90% of the graphic and 10-80% of the y-area. - C) The actual size of the entire graphic in the output viewer. Without knowing which one is the problem, I can't give you useful advice (because the advice for all 3 would be different!) Specifically, fixing C) can't be done in GGRAPH, but needs to be done in the chart template (which is a pretty simple fix actually). A) Is a problem that has to do with the scaling of the different variables (e.g. x1 has a range 0 - 100 and x2 has a range 1,000 to 20,000) and has no obvious solution but several potential ones (which may or may not involve manipulating B). ----- Andy W [hidden email] http://andrewpwheeler.wordpress.com/ -- View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Plotting-questions-tp5718009p5718017.html Sent from the SPSSX Discussion mailing list archive at Nabble.com. ===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD |
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