Robotbugs
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 Mar15 comment Finding a good difficult example function to minimize Shame you didn't put those in an answer. Great pointer! Mar15 accepted Finding a good difficult example function to minimize Mar15 comment Finding a good difficult example function to minimize Ooh thats pretty good... Mar15 asked Finding a good difficult example function to minimize Mar3 comment What is the intuitive relationship between SVD and PCA This was a little confusing in that normally the data matrix has n rows of samples of data with d dimensions along columns, like a least squares design matrix. If that is true then the covariance is $X^TX$, and the SVD result is $V\Sigma V^T$. I was also confused by the lack of normalization initially. But altogether a pretty clear explanation. Sep24 awarded Autobiographer Jul5 asked Linear Probability Density Transformations Jun22 awarded Tumbleweed Jun20 awarded Excavator Jun20 revised How to determine the step response using convolution of the signal's impulse response? fixed math formatting Jun20 suggested approved edit on How to determine the step response using convolution of the signal's impulse response? Jun15 asked Adaptive whitening / decorrelation Mar5 comment Finding a simple spline-like interpolating function OK well you'll be pleased to know that your answer is now incorporated into my iPad app. Mar5 comment Finding a simple spline-like interpolating function Actually my previous statement was false as I realize that introduces a singularity at $\alpha = 0.5$. (Its amazing how little appears on a screen when you have Infs in a vertex shader.) And I guess robotbugs could be both:) Mar5 comment Finding a simple spline-like interpolating function OK thats great because its just $\frac{kx}{x+c}$ which is very few math operations. I can precompute the two constants. Mar5 accepted Finding a simple spline-like interpolating function Mar5 awarded Commentator Mar5 comment Finding a simple spline-like interpolating function You have a mix of $k$ and $x$ in there. Are they supposed to be the same variable? Mar5 comment Finding a simple spline-like interpolating function Also what did you use to display such a nice graph on here? I was wondering how to get a diagram in my original post. Last time I tried to post something though I did not have enough standing on the forum to post images. Mar5 comment Finding a simple spline-like interpolating function Thanks, thats exactly the form of curve I was looking for. I can certainly live with a square root function. Many thanks!