The various options to visualize data in KNIME allow you to get an overview or even publication-quality figures from the data you have preprocessed and analyzed.

The interactive versions of a node allow you to change the column selections and probably the other extra options.

The JFreeChart nodes generate images from the input data, which is also available as a view with further customization options. These nodes usually do not support the HiLite feature and the different visual properties (color, size, and shape).

First, to help decide what you use to open the data, we will compare the capabilities of the different visualization nodes:

There are a few other view-related nodes in KNIME (and many more with mostly textual views). The Image To Table node can be useful when you want to iterate (loop) through certain parts generating images. Because the image ports (dark green filled rectangles) cannot be used with loop end nodes, you have to convert them to a table column. This is the exact purpose of the Image To Table node.

On the other hand, when you want an image port to hold an image (for example, to include it in a report), you should use the Table To Image node, which selects the first row's selected image column and returns it as an image port object.

The last notable node is the Renderer to Image. It simply grabs a column and the selected renderer, and creates an SVG or PNG image column with its content. You can use this later in web pages or other places, where supported. This is very handy when you want to handle a special kind of content; for example, molecules.