# Tagged Questions

18 views

### A simple plot of a list in R

This is a very easy question, I guess. But unfortunately I struggle to solve it in an easy way: I have a list in R. I would like to plot the entries of each column vertically and label the x-axis to ...
8 views

### Histogram of three uneven datasets

I have three data sets consisting of times (hours) when something happened. The data sets have 2005, 826, 276 events respectively, so they're quite disproportionate. What I wanted to do was show how ...
31 views

### normalize function -inf to inf to integrate to one.

I have a function of the probability distribution (method of k nearest neighbor). How I normalize this function , that the area under the graph is equal to unity. I mean it will make the prob from ...
30 views

### Plot histogram and density function

I need to plot a histogram for the data: ...
29 views

### How to find change points in a graph on matlab

I have a graph like this I need to find points at which sudden changes happening for the DPC Time Curve. We can observe that at time 20 and around 70 increase is happening. How to do this in Matlab. ...
103 views

### Curve Fitting a Cyclical Pattern of Data

I'm analyzing phonological characteristics of the 22 letters used in the Hebrew alphabet, and assigned each letter an enumeration to see if they are organized based on place of articulation: ...
237 views

### How to find (and plot) a probability distribution function?

I'm working on my biometrics course, and I have to plot a pdf (I think it means probability density / distribution function). Here is a sample pdf graph : Introduction to Biometrics page 5 , figure ...
52 views

### find a function such that it is symmetric across $y=1-x$ passing through $(0,0)$ and $(1,1)$, (not homework)

I am attempting to characterize a specific type of function. The function would be such that it is symmetric across the line $y=1-x$ This function would be a mapping $f:[0,1]\rightarrow [0,1]$ such ...
34 views

### $\exp(1i * 2 * \pi * (1:K) / K)$ to create clockwise format.

I was reading the documentation of R about text. here in the example : ...
79 views

### Need suggestions to fit unknown functions

I've generated these curves from a set of data and would like to fit them to come up with a model for a program I'm writing. Can anyone suggest functions that might approximate my curves? I'm a ...
106 views

### Guess the functional form of a graph

Can you guess the functional form of the following curve y is 0 at x= Infinite ; y is very small ( +ve near to zero) at x=0 Thanks and regards
48 views

### Truncating a Time-Series Graph

I'm looking for a way to truncate outliers in a time-series graph. Some context: I'm plotting two different metrics on a single graph. It's important to understand what portion of "Metric A" takes ...
74 views

### Why does a linear line on a logscale vs. logscale plot imply an exponential relashionship?

I've seen this type of plot many times in the context of exponential relationships (e.g., Bak's sandhill). If I increase the variable on the x-axis tenfold, and I get back a tenfold increase in y, ...
41 views

### Box Plot Log Scaled?

When making box plots to represent data, is it logical to set our axis scale to logarithmic? Or does that defeat the whole point of a box plot?
38 views

### Generating statistics from data samples, that are of snapshots.

My question is part math part computers but I need more of the math answer then a computer answer. I am going to be grabing snapshots of a moment of time on how a computer is performing. Because of ...
327 views

### 1/f “Pink Noise” for the Math-Disabled

I have very little skill when it comes to math beyond all the elementary level operations (addition, subtraction, multiplication, division, mean, mode, etc) and a vague grasp of statistics, what a ...
129 views

### Best Fit Line/Linear least squares fits

In my Physics intro/data analysis lecture, theres some mention of "Linear least squares fits": Gradient $$m = \frac{1}{\Delta} (N \sum x_i y_i - \sum x_i \sum y_i)$$ \sigma_m = ...
493 views

### Solving this pie-chart

Hi could anyone please guide me on how I would go about calculating the percentage of a specific sector from this Pi-chart. I think I am suppose to use data from the bar chart and apply it to the ...
1k views

### What is the correct way to plot histogram?

When we plot the frequency histogram, the frequency is equal to the area of the bar or the height of the bar? Is $\text{height} = \frac{\text{frequency}}{\text{size of the class}}$ ? If so, then how ...
198 views

### Weibull Distribution Behaving Weirdly?

I'm attempting to fit a cumulative Weibull curve to some psychophysics perception data. Basically, we're testing the subject's accuracy at a number of different motion speeds, and attempting to fit ...