Web Reference: Mar 26, 2015 · Tried couple of solution but it doesn't work or I do it incorrectly. As mentioned in the comments, there cannot be a continuous scale on variable of the factor type. You could change the factor to numeric as follows, just after you define the meltDF variable. Then, execute the ggplot command. The “discrete value supplied to continuous scale” message occurs when using the ggplot() function along with the scale__continuous()scale function to specify a specific scale for a graph. In this example of the basic usage of ggplot(), the scale function is not used. However, it does produce a successful graph of the data frame. Getting this messag... In this example, I’ll show how to get rid of the error message “Error: Discrete value supplied to continuous scale”. As explained before, this error message typically occurs when we want to set an axis limit in a ggplot2 graph.
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