linear scale

D3.md

@@ -97,7 +97,7 @@ A scale will map a data value to a visual value.
 1. Create a scale.  There are many types.  Here we'll use a linear scale
 
 	```javascript
-	var yScale = d3.scale.linear();
+	var yScale = d3.scaleLinear();
 	```
 
 1. Set up a visual range
@@ -106,27 +106,6 @@ A scale will map a data value to a visual value.
 	yScale.range([height,0]);
 	```
 
-1. Find maximum and minimum of the data set (called the "domain" of the data set)
-
-	```javascript
-	var yMax = d3.max(data, function(element){
-		return parseInt(element.TMAX);
-	})
-	var yMin = d3.min(data, function(element){
-		return parseInt(element.TMAX);
-	})
-
-	var yDomain = [yMin, yMax];
-	```
-
-	- Can combine this into one call if max/min come from same element:
-
-	```javascript
-	var yDomain = d3.extent(data, function(element){
-		return parseInt(element.TMAX);
-	});
-	```
-
 1. Add the domain
 
 	```javascript
@@ -152,6 +131,27 @@ A scale will map a data value to a visual value.
 	yScale.invert(800); //returns the data value that maps to this visual value
 	```
 
+1. If data min/max of a data set (called the "domain") are not found, you can find them:
+
+	```javascript
+	var yMax = d3.max(data, function(element){
+		return parseInt(element.TMAX);
+	})
+	var yMin = d3.min(data, function(element){
+		return parseInt(element.TMAX);
+	})
+
+	var yDomain = [yMin, yMax];
+	```
+
+	- Can combine this into one call if max/min come from same element:
+
+	```javascript
+	var yDomain = d3.extent(data, function(element){
+		return parseInt(element.TMAX);
+	});
+	```
+
 ## Time Scale
 
 1. Create the scale