diff --git a/2-Regression/3-Linear/README.md b/2-Regression/3-Linear/README.md
index c9060034..b0b63fd9 100644
--- a/2-Regression/3-Linear/README.md
+++ b/2-Regression/3-Linear/README.md
@@ -105,11 +105,11 @@ Now that you have an understanding of the math behind linear regression, let's c
From the previous lesson you have probably seen that the average price for different months looks like this:
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This suggests that there should be some correlation, and we can try training linear regression model to predict the relationship between `Month` and `Price`, or between `DayOfYear` and `Price`. Here is the scatter plot that shows the latter relationship:
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Let's see if there is a correlation using the `corr` function:
@@ -128,7 +128,7 @@ for i,var in enumerate(new_pumpkins['Variety'].unique()):
ax = df.plot.scatter('DayOfYear','Price',ax=ax,c=colors[i],label=var)
```
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Our investigation suggests that variety has more effect on the overall price than the actual selling date. We can see this with a bar graph:
@@ -136,7 +136,7 @@ Our investigation suggests that variety has more effect on the overall price tha
new_pumpkins.groupby('Variety')['Price'].mean().plot(kind='bar')
```
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Let us focus for the moment only on one pumpkin variety, the 'pie type', and see what effect the date has on the price:
@@ -144,7 +144,7 @@ Let us focus for the moment only on one pumpkin variety, the 'pie type', and see
pie_pumpkins = new_pumpkins[new_pumpkins['Variety']=='PIE TYPE']
pie_pumpkins.plot.scatter('DayOfYear','Price')
```
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If we now calculate the correlation between `Price` and `DayOfYear` using `corr` function, we will get something like `-0.27` - which means that training a predictive model makes sense.
@@ -219,7 +219,7 @@ plt.scatter(X_test,y_test)
plt.plot(X_test,pred)
```
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## Polynomial Regression
@@ -248,7 +248,7 @@ Using `PolynomialFeatures(2)` means that we will include all second-degree polyn
Pipelines can be used in the same manner as the original `LinearRegression` object, i.e. we can `fit` the pipeline, and then use `predict` to get the prediction results. Here is the graph showing test data, and the approximation curve:
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Using Polynomial Regression, we can get slightly lower MSE and higher determination, but not significantly. We need to take into account other features!
@@ -266,7 +266,7 @@ In the ideal world, we want to be able to predict prices for different pumpkin v
Here you can see how average price depends on variety:
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To take variety into account, we first need to convert it to numeric form, or **encode** it. There are several way we can do it: