Hi. I'm trying to plot the ratio of used versus unused bird houses (coded 1 or 0) versus a continuous environmental gradient (proportion of urban cover [purban2]) that I would like to convert into bins (0 - 0.25, 0.26 - 0.5, 0.51 - 0.75, 0.76 - 1.0) and I'm not having much luck figuring this out. I ran a logistic regression and purban2 ends up driving the probability of a box being occupied so it would be nice to show this relationship. I'm also plotting the fitted values vs. purban2 but that's done. Any suggestions would be appreciated.
Many thanks, Jeff Data sample: box use purbank purban2 1 1 0.003813435 0.02684564 2 1 0.04429451 0.1610738 3 1 0.04458785 0.06040268 4 1 0.06072162 0.2080537 5 0 0.6080962 0.6979866 6 1 0.6060428 0.6107383 7 1 0.3807568 0.4362416 8 0 0.3649164 0.3154362 9 0 0.3505427 0.2483221 10 0 0.3476093 0.1409396 11 0 0.3719566 0.3020134 12 1 0.09238011 0.1342282 13 0 0.08616111 0.1073826 14 0 0.07388724 0.04026845 15 1 0.07046477 0.03355705 . . . **************************************** Jeffrey A. Stratford, Ph.D. Postdoctoral Associate 331 Funchess Hall Department of Biological Sciences Auburn University Auburn, AL 36849 334-329-9198 FAX 334-844-9234 http://www.auburn.edu/~stratja ______________________________________________ R-help@stat.math.ethz.ch 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.
