1. A method of detecting onset of a gas turbine condition, which, if left uncorrected, may result in a malfunction of a gas turbine, said method comprising: receiving data indicative of an operating parameter of a compressor of the gas turbine; performing a wavelet transformation on the data to generate wavelet transformed data, said wavelet transformation configured to affect a processing characteristic regarding a performance of said wavelet transformation; generating said wavelet transformed data; and identifying features in said wavelet transformed data indicative of onset of the gas turbine condition.