Methods of analysis and representation of multidimensional data. Application to experimental results of nuclear physics

This research thesis aimed at developing methods of analysis and of representation of results of multi-parametric experiments performed in a nuclear physics laboratory. Information obtained during these experiments is processed on line, either by means of an entirely cabled system, or by means of a mini-computer, in order to control that the experiment is running correctly. Moreover, information is recorded for a later and more elaborated processing. This whole processing therefore comprises a first phase of raw recording under a defined form in order to have a single data input format for all compilation programmes. Magnetic tapes are used as an intermediate support for all these operations. As elementary information is not directly exploitable, in order to obtain energy spectra for the various reactions, elementary data must be integrated. This is performed by means of incremental software. Several routines for graphic representation have been developed. These methods of representation have been applied to two types of experiments (particle discrimination, coincidences) performed in the laboratory