PROVIDING A CORRELATION RING FOR INDICATING CORRELATION BETWEEN ATTRIBUTES
Pixels representing attributes of data records are into discrete rings of a graphical visualization, where the discrete rings correspond to respective ones of the attributes, and where the pixels are arranged in each of the discrete rings according to time intervals of the data records. A correlation ring is provided in the graphical visualization in addition to the discrete rings, where the correlation ring has visual indicators for indicating degrees of correlation between at least two of the attributes.
1 . A method comprising:
placing, by a system having a processor, pixels representing attributes of data records into discrete rings of a graphical visualization, where the discrete rings correspond to respective ones of the attributes, and where the pixels are arranged in each of the discrete rings according to time intervals of the data records; and
providing a correlation ring in the graphical visualization in addition to the discrete rings, where the correlation ring has visual indicators for indicating degrees of correlation between at least two of the attributes.
2 . The method of claim 1 , wherein each of the discrete rings contains pixels representing a corresponding time series of attribute values for a respective one of the attributes.
3 . The method of claim 1 , wherein the visual indicators comprise different brightness for indicating corresponding degrees of correlation.
4 . The method of claim 1 , wherein the correlation ring is provided as an outermost ring around the discrete rings.
5 . The method of claim 1 , further comprising, in a particular one of the discrete rings, assigning colors to the pixels according to values of the attribute corresponding to the particular discrete ring.
6 . The method of claim 1 , further comprising fading portions of the correlation ring corresponding to time intervals of low correlation between the at least two attributes.
7 . The method of claim 1 , further comprising:
receiving a selection of one of the pixels; and
displaying information of the data record represented by the selected pixel.
8 . The method of claim 1 , wherein the correlation ring has visual indicators for indicating degrees of correlation between more than two attributes, the method further comprising:
computing pair-wise correlation coefficients for corresponding pairs of the more than two attributes, in successive time windows; and
aggregating the pair-wise correlation coefficients in each of the time windows to indicate a corresponding degree of correlation among the more than two attributes.
9 . An article comprising at least one machine-readable storage medium storing instructions that upon execution cause a system to:
determine degrees of correlation among a plurality of attributes of data records;
generate a ring-based graphical visualization having a plurality of discrete rings for respective ones of the plurality of attributes;
place pixels representing the attributes of the data records into the discrete rings, where the pixels placed into a particular one of the discrete rings correspond to a respective one of the attributes, and where the pixels are arranged in each of the discrete rings according to time intervals; and
provide a correlation ring in the ring-based graphical visualization in addition to the discrete rings, where the correlation ring has visual indicators for indicating the degrees of correlation among the plurality of attributes.
10 . The article of claim 9 , wherein the instructions upon execution cause the system to further:
receive user selection of a particular one of the pixels; and
display information of a data record corresponding to the particular pixel in response to the received user selection.
11 . The article of claim 9 , wherein each of the discrete rings contains pixels for a corresponding time series of attribute values.
12 . The article of claim 9 , wherein the instructions upon execution cause the system to further:
assign different colors to the pixels according to corresponding attribute values.
13 . The article of claim 9 , wherein determining the degrees of correlation comprises determining pairwise correlation coefficients between respective pairs of the plurality of attributes, and wherein the instructions upon execution cause the system to further
compute an aggregate correlation coefficient based on aggregating the pairwise correlation coefficients; and
generate the visual indicators for the correlation ring based on the aggregate correlation coefficient.
14 . The article of claim 9 , wherein the visual indicators are provided for respective time intervals according to the degrees of correlation among the plurality of attributes in the corresponding time intervals.
15 . The article of claim 9 , wherein the visual indicators comprise different brightness, where greater brightness indicates a higher degree of correlation among the plurality of attributes.
16 . A system comprising:
at least one processor to:
place pixels representing attributes of data records into discrete rings of a graphical visualization, where the discrete rings correspond to respective ones of the attributes, and where the pixels are arranged in each of the discrete rings according to time intervals of the data records; and
provide a correlation ring in the graphical visualization in addition to the discrete rings, where the correlation ring has visual indicators for indicating degrees of correlation between at least two of the attributes.
17 . The system of claim 16 , wherein the visual indicators comprise different brightness, where greater brightness indicates a higher degree of correlation among the plurality of attributes.