About Site Map Submit Contact Us Log in | Create an account
Create an account Log In
Average Rating
User Rating:
Visitors Rating:
My rating:

Write review
See full specifications

scripts default iconNash-Sutcliffe Model Accuracy Metric (Scripts) Publisher's description

Nash-Sutcliffe model accuracy statistic.

Nash-Sutcliffe model accuracy statistic. Nash-Sutcliffe coefficient is an indicator of the model?s ability to predict about the 1:1 line between observed and simulated data.

The Nash-Sutcliffe coefficient is calculated as:

sum(Qobs - Qsim)^2
NS = 1 - ----------------------------
sum(Qobs - Qmean)^2

With the Nash-Sutcliffe measure, an r-square coefficient is calculated using coefficient values equal to 1 indicate a perfect fit between observed and predicted data, and r-square values equal to or less than 0 indicate that the model is predicting no better than using the average of the observed data. Thus Ockham's razor should be applied.

Dimensions of Observed data array does not have to equal simulated data. An intersection is used to pair up observed data to simulated. This function is setup to pair up the first column in the observed data matrix and the first column in the simulated data matrix. Data values are located in column 2 of both matricies.

One critical assumption to this measurement is the data are normal.

[NSout metric_id] = nashsutcliffe(obsDATA, simDATA)

obsData = N x 2
simData = N x 2

For convenience, I?ve also posted a skillscore function which is a derivation of the Nash-Sutcliffe. Both these functions submitted are not much more than a novelty given the simplistic nature of the statistic. And my plug on a highly valuable statistic I submitted a while ago, is non-parametric trend test, the Mann-Kendall Tau-b (named ktaub.m in the Earth Sciences category). Besides the dire need for such a statistic in MATLAB, the design has some elegance in it.

System Requirements:

MATLAB 7.3 (R2006b)
Program Release Status: New Release
Program Install Support: Install and Uninstall

Nash-Sutcliffe Model Accuracy Metric (Scripts) Tags:

Click on a tag to find related softwares

Is Nash-Sutcliffe Model Accuracy Metric (Scripts) your software?

Manage your software

Most Popular

scripts default icon ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation 1.1
ASK, OOK, FSK, BPSK, QPSK, 8PSK modulation contain several functions for digital modulation simulation
scripts default icon Simulink Communication Labs 1.1
Simulink Communication Labs allows you to learn communication systems in greater depth.
scripts default icon M-QAM modulation and demodulation 1.1
M-QAM modulation and demodulation is the QAM modulation and demodulation tech.
scripts default icon LZW Compression/Decompression 1.1
LZW Compression/Decompression - Updated LZW compressor and decompressor with reasonable performance
scripts default icon InSPIRE utility to plot a 2D displacement field (Scripts) 1.0
This program plots the deformation field (displace vectors) contained in vector.txt.