Just KNIME It! Round 6

You are doing research on trading and different currencies and one of your tasks is to compare the daily exchange rates of US dollar vs 8 other currencies from 1980 to 1998. The data contains some missing values due to public holidays on weekdays, which you should handle first using a strategy of your choice. After that, you should calculate the correlations between the exchange rates of the currencies and visualize them. Which currencies had the highest positive/negative correlation? Which currencies were not correlated, or had a low correlation?