where can I get datasheet for KNN weather generator? , or could you give me the sample of datasheet please? i need it, it's for personal use.

KNN weather generator is a commercial software and it's not open source. The KNN weather generator is a tool for lead time simulation of daily weather data based on K-nearest-neighbor approach. The user can load seven different variables, for example Tmin, Tmax, Rain, Srad, ETo, WSPD, and Humidity. You can load data in datasheet (excel sheet) and this is a sample for using one variable: climate data. If you want input several data you should insert new column

In other hand, if you mean that you need calculation excel sheet, we don't have calculation data sheet due to KNN weather generator develop by c# language and it's a commercial software.

The most promising nonparametric technique for generating weather data is the K-nearest neighbour (K-NN) resampling approach. The works of Lall et al. (1996), Rajagopalan and Lall (1999) and Buishand and Brandsma (2001) describe various forms of K-NN resampling. A K-NN algorithm typically involves selecting a specified number of days similar in characteristics to the day of interest. One of these days is randomly resampled to represent the current day's weather.

A basic K-NN algorithm involves selecting a specified number of days similar in characteristics to the day of interest. One of these days is randomly resampled to generate the weather of the next day in the simulation period. The nearest neighbour approach involves simultaneous sampling of weather variables, such as precipitation and temperature. The sampling is carried out from the observed data, with replacement. To simulate weather variables for a new day (t+1), days with similar characteristics as those simulated for day t are selected from the historical record. One of these nearest neighbours is then selected according to a defined probability distribution or kernel and the observed values for the day subsequent to that nearest neighbour are adopted as the simulated values for day t+1.

A limitation of K-NN weather generators is that they do not produce new values but merely reshuffle the historical data to generate realistic weather sequences. Agrimetsoft has tried to develop a perfect tool of k-NN method which can easily run by the user. It has different optiones, and the user can select different numbers of weather data for running k-NN WG. By running KNN weather generator from Agrimetsoft's website you can learn the different steps of the mentioned tool. If you want to customize this tool in any format with other options, just contact us (kolsoomi57@gmail.com), and order your desirable tool.