graphs

  1. M

    How can I determine if two graphs are statistically significantly different

    Hi, I'm working on a medical research project and need some stats help. I have limited statistical knowledge but I understand that basics. I need help with the following... I have two graphs: A: y = -0.000003x^3 + 0.000664x^2 - 0.028609x + 0.333098 B: y = -0.000003x^3 + 0.000781x^2 -...
  2. I

    Spss - split file option

    Hi guys, so I have been using SPSS and i'm very confused. I have made a variable as a split file. Then i wanted to create a chart. When i create the chart, the output file gives me various (like over 10 graphs) separating the variable into groups making different graphs for each group. I was...
  3. P

    Type of analysis to be used - Important because I have a deadline :(

    Hello, I am writing my thesis on innovation management which involves a survey analysis. I am using SPSS statistical tool to perform this analysis but right now I have a blocking point in the type of analysis being used? All the questions were all based on scale between 1-7 (1:completely...
  4. M

    Non-Parametric Analyses. Report medians and 95% CI in graphs?

    Okay so, I'm currently writing my thesis, and I have to do non-parametric tests. I know that I have to report the medians in text. However, I'm doing graphs. Just wanted to ask whether anyone knows if I report the 95% CI and the medians in the graphs? When i do this it looks super weird and...
  5. M

    R graphs and capabilities

    Hello everyone, I am a MATLAB-user (in my previous work & education) but my company has R installed (and I don’t think there is the will to get an expensive MATLAB license). I am vaguely familiar with R as I used it for a statistics class 8 years ago, but I haven’t touched it since then...
  6. Phaedrus

    Graphically check linearity in logit regression

    Hi all, I am running a logit regression where the outcome variable is binary. I am interested in checking, graphically, whether the relationship between a given predictor and my dependent variable is (more or less linear). I understand that the logit of the outcome ought to be linear, not the...
  7. J

    dendrogram graph - how many clusters would you pick in this with reasons why?

    Hi having a little problem with this question which i need to learn for my test coming up.. i have produced a dendrogram (on sas enterprise) which consists of 77 countrys with various information. I need to discuss the graph and explain how many clusters i would pick and why? (its more...
  8. W

    Time Series and Rolling Regression Using Stata

    Hi, I tried to run rolling regression on some inflation rates data and plot the coefficient values with Stata 10 but couldn't get the results I want. Below are some selected Stata codes [not the full set] I used: //my data are yearly inflation rates [variable "inflat"], and the duration is...
  9. L

    Modifying X axis

    Hi, I'm pretty new to R, and I have a question about plots. I've made a histogram about my data, but because i have very few data above 5, i grouped them all in '>5'. So I want my X axis like: 0 1 2 3 4 5 >5. Now I've got: 0 1 2 3 4 5 6 and >5 is written 'under' the 6. This is the code...
  10. N

    Panel data graphs in STATA using by command

    Hi i am trying to make graphs using stata of panel data, with alot of stocks. The by variable i have to use is stock name, so that i get a two way line plot of a stock price and date for every stock in the panel data. The problem is when i use stock as the by variable, stata produces 400...
  11. jpkelley

    [R graphics export/import] High-res graphics from R into Word

    Hi all, I'm completing graphs for my dissertation, and I decided to bite the bullet and ask all of you gurus about how to efficiently export R graphics into Word (no, I'm not using Latex yet). By export into Word, I simply mean export the high-res image into a folder for eventual import into...
  12. R

    Plotting Medians Vs Means: non-parametric data

    Hi, I'm a PhD student who has been spending a lot of time lately analysing data (as seems to norm!) - a lot of my data sets fail normality tests, although show significant differences in the rank of means. My question, however, is what is the best way to represent such data? I originally...
  13. S

    build 2 graphs separated by levels of an IV?

    Hello there! I'm trying to make a graph in R: it should be a lineplot with SE bars; x-axis there are 5 treatment levels, y-axis the continuous DV. Also, the data should be separated by years (which I managed to do) but also an additional IV grouping variable (let's call it Q). I think it's...
  14. G

    Facebook friend probability

    What is a probability to be friend with a random facebook user ? Is it correct to state that, because the average friend of a Facebook user is 135 and the users are 500.000.000, the probability to be friend of a random user are 135/500.000.000, and is it still correct to say that the...
  15. F

    Correlation matrix pinted into table. How?

    I need to create a "decent" correlation matrix; the output of the R is really ugly and not easy to follow What are my choices? How can I export the output into a simple table? Also, I found on the net this beautiful correlation matrix at...
  16. W

    HELP! Stats method for comparing curves?

    Hello all, I was hoping you guys might be able to assist me, I'm in the middle of writing a biology honors thesis and I'm trying to compare the thermal accumulation of different years to see if there's a correlation between them thermal accumulation trend line and an epidemic or non-epidemic...