JustKnimeItChallenge-4

You are using KNIME to monitor the daily price of a product online. After using the Line Plot node to visualize the daily prices you have already gathered, you notice that they are often constant for a certain number of days before changing again. You want to create a new column in the price data you have at hand, named "Change", such that its value is 1 if a daily price changed with respect to the previous day, or 0 if it remained unchanged. For the first daily price in the data, the "Change" value should be 1. As an example, if the initial daily prices look like:

Date Price
2015-01-01 10
2015-01-02 10
2015-01-03 11

You should end up with data in the following format:

Date Price Change
2015-01-01 10 1
2015-01-02 10 0
2015-01-03 11 1