![]() Perhaps if you explain the reason behind wanting to remove the red “?”, then we may propose the proper solution. You can do this via the Missing Value that suggested, or via String Manipulation or via Column Expressions, and via some of the available programming languages that Knime support.ĭo you really want to change the data? Will there be any conflict with existing data? Will you want to distinguish between a NULL record vs record with an empty string? Would you want to count how many missing records do you have for example? This is straight forward to do if the missing cells stay as missing values. The node can be configured to handle either of the definitions of missing or both. For the second definition all rows would therefore be empty in a given input table. An empty row can be defined as: a row that has only missing cells or a row that has no columns. They would be converted to an empty string of “”, and there are a few ways to do this. This node removes empty rows from the input table. These cells would no longer be NULL/empty/uninitialized. To not see the red “?”, you can replace the empty/uninitialized cells with an empty string. Filter blank rows out nicole January 14, 2019, 8:15pm 3 Thank you very much. 6 Likes Fill in missing Values in a column with none or unknown. Knime is not actually adding anything there, it’s just how it displays empty/uninitialized cells. You could use the toNull () function in the String Manipulation node to convert blanks to missing values, and then handle all missings at once with the Missing Value node. Regarding your question, may I ask what you want to remove the red “?”? It’s just a display thing in Knime. I put the emphasis on red, because you could also have “?” as data, in which case, it will be a black “?”, like any other data. This can be used to search and replace, compare, or concatenate strings in multiple columns at once. Since the string literals support string escape sequences (like a tab, \t, or newline, ) backslashes must be doubled to introduces single literal backslashes. Hi, that is correct, Knime shows a cell with missing values (such as NULL) with a red “?”. The String Manipulation (Multi Column) node is an extension of the String Manipulation node, applying the provided expression to every selected column in turn.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |