Embodiments of the invention relate to a method and apparatus for displaying information. In a specific embodiment, at least two pluralities of voxel values for a corresponding at least two functions with respect to at least a portion of a subject can be obtained. The at least a portion of the subject can have a plurality of local volume elements, where the at least two pluralities of voxel values for the corresponding at least two functions each correspond to the plurality of local volume elements. In this way, there is a voxel value for each function for each local volume element of the portion of the subject. Each of the at least two pluralities of voxel values represents the value of the corresponding function of the at least two functions for the corresponding plurality of local volume elements. A representation is created where the value of one of the at least two functions is on a first axis and a count of voxels is on a second axis. The count of voxels on the second axis is at least a portion of the count of voxels having the value of the one of the at least two functions on the first axis. In another embodiment, the value of the other one of the at least two functional mechanisms can be on a third axis. The count of voxels on the second axis can then be the count of voxels having the value of the one of the at least two functional mechanisms on the first axis and having the value of the other one of the at least two functional mechanisms on the third axis.