Sas-保持过程表示按类平均值的输出

这就是我到目前为止所拥有的，它输出的平均值等于HR，这根本不是我想要的，当它应该采用每类HR的平均值并保留这些值时。我做错了什么

目前看起来是这样的：

当我希望它保持打印出的浓度值时：

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如其他地方所述，您需要VAR语句

data braindata;
infile "C:\Users\shockwavemasta\Downloads\brain-data.txt"
firstobs = 3 /* data starts on line 3, not on line 1 or 2 in the file*/
expandtabs /* change tabs into 8 spaces each */
pad; /* pads each entry with spaces as needed */
/* The variable names are taken from the file header.
E.g., @9 HourDrawn 3. means the value of the hour variable is           
located at column 9 and uses 3 characters to express the number.
*/
input @9 HourDrawn 3. @17 Sex $1. @22 Concentration 11.;
hr = HourDrawn;
run;

proc sort data = braindata out = brainmean_sorted;
by sex;
run;

proc means data = brainmean_sorted;
by sex; class hr;
output out=BrainMeans mean=mean;
run;

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谢谢你的编辑！现在，如果有人能帮我，哈哈，请不要开始这样的新问题-你应该编辑你的另一个问题。请现在删除另一个问题。

proc means data = brainmean_sorted;
by sex; class hr;
var concentration;
output out=BrainMeans 
mean(concentration)=mean;
run;