proc sgplot data=sashelp.classfit;
  title "Fit and Confidence Band from Precomputed Data";
  band x=height lower=lower upper=upper /
       legendlabel="95% CLI" name="band1";

1117     proc tpspline data=model_set;
1118        model daysofTm90=centeryear year3/alpha = 0.05;
1119        output out =result pred uclm lclm;
1120     run;

ERROR: At least one smoothing variable is required. If you only want to fit a parametric model,
       you can use PROC GLM or PROC REG.
NOTE: The SAS System stopped processing this step because of errors.

WARNING: The data set WORK.RESULT may be incomplete.  When this step was stopped there were 0
         observations and 0 variables.
WARNING: Data set WORK.RESULT was not replaced because this step was stopped.

NOTE: PROCEDURE TPSPLINE used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds

1121
1122
1123   ods graphics on;
1124


1125     proc sgplot data=result;
1126        title "polynomial regression for Tm90";
1127
1128        xaxis label="year";
1129        yaxis label="days of Tm90";
1130
1131        band x=year lower=lclm_daysofTm90 upper=uclm_daysofTm90/name="range"
ERROR: Variable LCLM_DAYSOFTM90 not found.
ERROR: Variable UCLM_DAYSOFTM90 not found.
1132                    legendlabel="95% CI of Predicted daysofTm90";
1133        scatter x=year y=daysofTm90/name="obs" legendlabel="daysofTm90";
ERROR: Variable DAYSOFTM90 not found.
1134        series x=year y=p_daysofTm90/name="pred"
ERROR: Variable P_DAYSOFTM90 not found.
1135                    legendlabel="predicted values of daysofTm90"
1136                    lineattrs=graphfit(thickness=1px);
1137
1138        discretelegend "range" "obs" "pred";
1139     run;

我用了这些,log 出现错误怎么回事情啊，求高人指点