%Macro Average Variable with Proc Mean

[MarvelJJ]

I am attempting to create a macro that will average the variables in column "Assignment1"  but I am unable to get it to work.  

Grades.csv

Name	Gender	Assignment1	Assignment2	Assignment3	Assignment4
Aldrin	M	98	56	81	94
Becky	F	100	54	100	99
Carl	M	95	69	48	93
Daphne	F	57	79	82	46
Eriksen	M	83	98	72	85
Frank	M	46	89	78	67
Gary	M	86	83	72	87
Hobbs	M	68	57	82	73
Isabella	F	98	85	88	63
Jeanette	F	74	92	78	48
Kevin	M	81	61	62	87
Lily	F	49	87	52	97
Mickey	M	66	63	75	75
Nora	F	66	47	42	88
Oprah	F	92	86	52	59
Patrice	F	51	100	79	75
Quinn	F	60	77	42	84
Robin	F	54	41	89	65
Stella	F	61	50	53	89
Tracy	F	54	72	71	86
Ursula	F	80	80	99	70
Victoria	F	52	59	46	84
Wendy	F	50	47	64	63
Xander	M	94	45	66	91
Yasmine	F	84	68	77	93
Zoey	F	64	40	71	71

The code I have is :

%macro average(variable=);
	proc means data=work.grades mean;
		var &variable;
	run;
%mend;

%average(variable=Assignment1);

I am using SAS University addition and I cannot figure out what I am doing wrong.  Thank you for any help.  I am am new to SAS. 

[Astounding]

Your code looks OK.

Examine the log to see what guidance it provides. The answer is likely to be simple. For example, perhaps you have a csv file named GRADES but never created a SAS data set named GRADES.

[Shmuel]

haven't you miss the output statement ?

%macro average(variable=);
	proc means data=work.grades mean;
		var &variable;
           output out=mean_of_&variable;
	run;
%mend;

%average(variable=Assignment1);

[Kurt_Bremser]

The SAS log is the #1 diagnostic tool (also see Maxim 2), so please post the log of your macro call; use the same posting method ({I} button) that you used for posting the code.

As @Astounding already said, the code as such looks good.