About mftuchman

mftuchman · ‎07-11-2009

Thanks for all the replies so far! To doc@duke - in subsequent flows after the initial data set is built, how would you characterize your style. Message was edited by: mftuchman

mftuchman · ‎07-09-2009

How do you like to work in EG? A single code node? A few code nodes in sequence? Lots of queries spread out in a flow chart? What internal guidelines do you follow to make your work manageable for yourself or for others? I'm putting together a list of style pointers for nice EG. Here are some that I use based on my own experience. Please don't interpret them as rigid commandments. The purpose of this is to gather feedback. Particularly good may ideas will be mentioned explicity in a NESUG poster (with author's permission, of course). * One Idea per node, particularly code nodes * Minimize crossings of arrows * I Never (OK, rarely) terminate a branch with a data set. Branches should be terminated by reports of some kind. * I Always rename queries. I rarely know two weeks later what "query1" is supposed to do. That's just a sample, and I bet you have even better ideas.

mftuchman · ‎06-22-2009

One additional detail - if I'm only printing one table, I can use the /ACTIVEFOOTN option to set my footnote globally, but that's not what I am referring to in this particular question. Another approach is to use the nocenter option, but again, what I am after is the ability to put formatting commands in my OBFOOTN statement. Added some more detail to preclude certain workarounds being counted as 'the answer'. Message was edited by: mftuchman

mftuchman · ‎06-22-2009

With footnotes, I can include some formatting commands like FOOTNOTE J=L H=1 "I LOVE SAS"; However, the OBFOOTN command in the DOCUMENT procedure (as of 9.1.3 at least) requires that the argument after the path be a quoted string. Anyway I can make my OBFOOTN be left justified? OBFOOTN ONEWAYFREQS#1 "I STILL LOVE SAS ANYWAY";

mftuchman · ‎01-07-2009

I need to look through some data sets created by the OUTMODEL statement in proc logistic to see if they are consistent with the parameters the staff *says* they used. Can anybody tell me how this data set is structured? I realize this is NOT the ideal way to recover a model. I don't need to write a lot of data step code - just to browse through it and find the betas for the various effects used.

mftuchman · ‎09-02-2008

Be honest now - when you read the book originally, did you skip the 'Whaling Chapters'?

mftuchman · ‎08-20-2008

I don't think this is multinomial (you wrote multinormal - I don't know what that is), but he has clearly specified the model correctly. For each class he has the number of trials and the number of observed events, and he is assuming that the number of events is a binomial distribution with probability p_{class}.

mftuchman · ‎08-20-2008

Although in principle, the volume is infinite since there is always the probability, albeit infinitesimal, that a particle can be arbitrarily as far as desired. It is a gas, after all. I was still thrown by the cone idea. Are you suggesting that if (X,Y,Z) are the position of a particular gas particle in space, that X,Y,Z are independent identically distributed normal?

mftuchman · ‎08-20-2008

You may be better off with a PROC RANK - rank your variable, then do a second pass with a data step using the same BY groups to subtract the percentile rank from the value of lower_limit. Then OUTPUT the first observation greater than the value in y10_lowerlimit. Or something like that. Obviously, you're closer to the situation than I am so I cannot make a definitive statement.

mftuchman · ‎08-19-2008

What is meant by the volume under a *curve*? Are you talking about the volume bounded by the x-y plane and the *surface* z=

mftuchman · ‎08-19-2008

In essence, what I'm hearing you say is that you want a different percentile point for each BY group, and the particular percentile is stored in the variable y10. Am I reading this correctly?

mftuchman · ‎08-08-2008

Sample code data testcat; drop i; infile datalines missover; input ind1-ind8 @; input original_input $ 1-15; array ind{8}; together = 0; do i = 1 to 8; together = 2 * together + ind{i}; end; together_as_str = put(together,binary8.); datalines; 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 ; run; ods listing; 15 title 'Make a string from 0 and 1'; 16 proc report data=testcat; 17 column original_input ('Format' together together=_a together = _b together_as_str); 18 define together / display 'Decimal'; 19 define _a / 'As Binary' format=binary8.; 20 define _b / 'As Hex' format=hex2. width=3; 21 run;

mftuchman · ‎08-08-2008

Why not just create the binary you want and then put it into binaryw. format when you are ready to present it as a string. This at least keeps the option open of working with these numbers as actual binary put(2 * ind1 + ind2,binary2.)

mftuchman · ‎08-05-2008

Another method that may work if you just want the counts of each duplicate key tuple is to use PROC FREQ with the LIST option.

mftuchman · ‎07-28-2008

Are you asking how to get proc tabulate to compute means based only on the non-missing values? data example; infile datalines; input a1-a6; datalines; 1 . . 1 1 1 1 1 0 0 1 1 . 0 1 1 . 1 . 0 1 . 1 1 . . 1 . 1 1 ; proc tabulate; var a1 a2 a3 a4 a5 a6; table (sum mean n nmiss), a1 a2 a3 a4 a5 a6; run; This seems to calculate means based on only the non-missing values. Or did you mean something else?

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