About LilyY_

LilyY_ · ‎04-29-2013

I have posted the code earlier (on#6). Here is the code proc mixed data=xxx covtest ; class ID Time; *or Class ID Time Role; Model yy=time role time*role/s; repeated time/type=cs sub=id rcorr; run; quit;

LilyY_ · ‎04-29-2013

There are no differences. Role as continuous or categorical got all the same fit stats( -2 LL, AIC, AICC, BIC)

LilyY_ · ‎04-26-2013

Hi Dr. Muhlbaier, I tried recode Role as 0,1. It didn't come with the same output as put it into CLASS statement. p_values are: Time: 0.0024, Role1:0.0183, time*role: 0.6874 Still, p values for role and time*role remained the same, but Time is different. correlation matrix and covariance parameter estimates for Role recoded as 0, 1 AND NOT in CLASS: Correlation Matrix and Covariance parameter estimates as Role in CLASS: Role as 1,2 AND NOT in CLASS;

LilyY_ · ‎04-26-2013

I have proc mixed data=xxx ; class ID Time; *or Class ID Time Role; Model yy=time role time*role/s; repeated time/type=cs sub=id; run; quit;

LilyY_ · ‎04-26-2013

Hi Steve, Time was continous in above example. Your explaination makes sense. But the attached output were from time as a categorical variables with/without put Role in CLASS statement. Any clue? Still only coefficient for Time changed. Role and Time*Role remained the same. Role In CLASS Statement: Role Not in CLASS Statement: Thanks,

LilyY_ · ‎04-26-2013

Thanks, Steve! I thought this won't change the results, but surprisely found the results changes significantly, not the binary variable itself, but the other variable has interaction term with it. why? I have time, role, time*role. if Role not in CLASS statement, I had those p_values from Type 3 tests: Time: p=.68, role: p=.25, time*role: p=.79 If Role in CLASS statement, Time: p=.04, role: p=.25, time*role:p=.79 Role and time*role didn't change, but time changed alot. why?

LilyY_ · ‎04-26-2013

Dear all, Do we have to put binary variable into class statement in modeling procedures like proc mixed? I somehow remembered saw somewhere if a variable is a binary variable, it doesn't matter whether put it to class statement or not. But why I got very different results when the binary variable was in the class statement? Should we always put all binary variables into class statement? Thanks,

LilyY_ · ‎06-26-2012

I figured it out. One way to do it is using proc template to change the default style.

LilyY_ · ‎06-26-2012

Dear all, I used proc sgplot reg statement to produce graphs. I used 'group' option to produce regression line for each group of a variable. Say one regression line each for low, med, and high BP levels. By default, I will get 3 different color lines. How can I get 3 different types of the lines? reg x=A y=B /group=&variable nomarkers; This is the one I used. I got 3 different colored lines. I want the same color but different type lines. Any easy way to do this? I tried lineattrs, but this will change all 3 lines. reg x=A y=B /group=&variable lineattrs=(pattern=2) nomarkers; Thanks, Lily

LilyY_ · ‎04-11-2012

Thanks. Mike. This is what I did. I created a count variable and then use pointlabel.

LilyY_ · ‎04-11-2012

Or any other SAS procedures can create this type of line graph? Basically, I have about 10+ time points, I want to graph out the mean value for each time point. Every time points may have from 1 to 100 cases. Thanks!

LilyY_ · ‎04-11-2012

Dear all, I have a plot produced by proc gplot. I now need to add on the case count to each data point. There are multiple cases with same value. Does anyone know how to do this without creating new variables? I know I probably can do this by creating a new "count" variable and then use pointlabel. Thanks in advance!

LilyY_ · ‎11-29-2011

It works! Thanks!

LilyY_ · ‎11-29-2011

Dear all, Does SAS has a simple function or procedure to calculate the t statitics and p_value for known mean and sd from samples? I only have the mean, sd, and sample size for each group. Original dataset are not available. Thanks,

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Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Binary variable in class statement?

Re: How to change line type in Proc Sgplot reg statement

How to change line type in Proc Sgplot reg statement

Re: How to put case count label in Proc Gplot

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Re: Binary variable in class statement?

Binary variable in class statement?

Re: How to change line type in Proc Sgplot reg statement

How to change line type in Proc Sgplot reg statement

Re: How to put case count label in Proc Gplot

Re: How to put case count label in Proc Gplot

How to put case count label in Proc Gplot

T value calculation with known mean and standard deviation

T value calculation with known mean and standard deviation