How to categorize a numeric number

[Lexclarke11]

This is my code - Unfortunately when I tried to run the new variable, it did categorize it but it did not rename them in proc format 

*Creation of a new categorical from Quantitative;

data Work.IMPORT;
	set work.IMPORT;

	if 1 <=age <=17 then
		AgeN="1";
	else if 18 <=age <=39 then
		AgeN="2";
	else if 40<=age <=55 then
		AgeN="3";
	else if age >=56 then
		AgeN="4";
run;


*Step 2;

proc format;
	value AgeFormat 1='Adolescent' 2='Young Adult' 3='MiddleAge' 
		4='Older Adult';
run;

*Step 3;

data WORK.IMPORT;
	set WORK.IMPORT;
	format AgeN AgeFormat.;
run;
proc freq data=Work.import;
	title "Table 5 :Frequency Table of New Categorical AgeC";
	tables AgeN;
run;
*Bar Chart of New Categorical Variable AgeC;
PROC sgplot DATA = work.import;
  	VBAR AgeC/ datalabel stat=percent  fillattrs=(color=grey);
  	TITLE1 "Figure 7:  Relative Frequency Bar Chart of New Categorical AgeC";
	xaxis label='AgeC' labelattrs=(size=12);
	yaxis label='Percentage of Victims Killed by Police' labelattrs=(size=12);
RUN;

[ballardw]

Your format is for numeric values and your AGEN variable is character as shown by assigning values like "1".

I suspect that somewhere in your log you have something similar to

"Format $AgeFormat not found". To work with values like "1" "2" etc the format name must be $AgeFormat to match character values.

Here is more typical use of format

proc format;
	value AgeFormat
 1 - 17='Adolescent' 
18 - 39='Young Adult' 
40 - 55='MiddleAge' 
56 - high ='Older Adult';
run;

You also reference a variable AgeC that may not have been created.

Use the format with the original numeric Age variable:

PROC sgplot DATA = work.import;
  	VBAR Age/ datalabel stat=percent  fillattrs=(color=grey);
   format age ageformat.;
  	TITLE1 "Figure 7:  Relative Frequency Bar Chart of Age categories";
	xaxis label='AgeC' labelattrs=(size=12);
	yaxis label='Percentage of Victims Killed by Police' labelattrs=(size=12);
RUN;

One of the very nice things about most formats is that you do not need to create a new variables to create groups of values and assign a nice label. Most of the analysis, reporting and graphing procedures will use the groups created (minor exception: graphing custom picture formats with date/time/datetime values)

[jokos]

data WORK.IMPORT;
	set WORK.IMPORT;
	format AgeN $AgeFormat.;
run;

 Hello, You need to put  "$" before the format name as I wrote it above.

[LeonidBatkhan]

Remove double quotes in your first data step:

data Work.IMPORT;
	set work.IMPORT;

	if 1 <=age <=17 then
		AgeN=1;
	else if 18 <=age <=39 then
		AgeN=2;
	else if 40<=age <=55 then
		AgeN=3;
	else if age >=56 then
		AgeN=4;
run;

because your format is defined for numeric variables. With the " " you create character variables.

Hope this helps.