Multidimensional data visualization apparatus, method, and program

A multi-dimensional data visualization device provided with a projective transform model including a plurality of nodes and a table, the plurality of nodes each holding a reference vector having a dimension identical to a dimension of input multi-dimensional data, the table storing information indicating a correspondence relation between each node and a coordinate in a projection target space, the multi-dimensional data visualization device comprising:

• a processor;
• and
• a storage medium having computer program instructions stored thereon, when executed by the processor, perform functions including:
• acquiring, by the processor, first and second multi-dimensional data for learning and extract characteristic amounts from the acquired first and second multi-dimensional data, respectively, the first and second multi-dimensional data including myoelectric signals passed through muscle fibers,
• the myoelectric signals detected by electrodes mounted on muscle sites, respectively,
• the acquired first and second multi-dimensional data including positive examples detected in an ideal motion state of the subject and negative examples detected in a motion state detached from the ideal motion state of the subject, and
• the characteristic amounts being one of amplitude characteristic amounts and frequency characteristic amounts extracted for each positive example and each negative example;
• updating, by the processor, the reference vector of each node based on the extracted characteristic amounts of the first and second multi-dimensional data;
• calculating, by the processor, based on the characteristic amounts of the first and second multi-dimensional data, a distance between each pair of coordinates when the updated nodes are projected into the projection target space in accordance with the table and update the table so that the distance is equal to or larger than a threshold value;
• and
• displaying, by the processor, motion of a subject on a display based on a result of the projection.