frequency

I want to plot the pitch of a sound into a graph. Currently I can plot the amplitude. The graph below is created by the data returned by getUnscaledAmplitude() : AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(new BufferedInputStream(new FileInputStream(file))); byte[] bytes = new byte[(int) (audioInputStream.getFrameLength()) * (audioInputStream.getFormat().getFrameSize())]; audioInputStream.read(bytes); // Get amplitude values for each audio channel in an array. graphData = type.getUnscaledAmplitude(bytes, 1); public int[][] getUnscaledAmplitude(byte[] eightBitByteArray,

I have a table that lists a freet text input from a survey where enterents were allowed to enter their responses (regarding colours they would like to have in their wedding) I would like to write a sql function that gathers all the information from this column, and orders counts the frequency of each word, ordering the result set by this count. Response -------- Red and White green White and blue Blue Dark blue I would like the above table to be ordered as follows Response Frequency -------- --------- Blue 3 White 2 And 2 Red 1 Green 1 I can strip all the rubbish words like "and" after the

I have data from a sensor and I need to find the frequency of it. It looks like fft() seems to be the way to go, but the MATLAB docs only show how to get a graph of the frequencies, I don't know what to do from there. Here's what my data looks like: One way to go is indeed to use an fft. Since the fft gives you the frequency representation of the signal, you want to look for the maximum, and since the fft is a complex signal, you will want to take the absolute value first. The index will correspond to the normalized frequency with maximum energy. Last, if your signal has an offset, as is the

I'm trying to display frequencies within barplot ... well, I want them somewhere in the graph: under the bars, within bars, above bars or in the legend area. And I recall (I may be wrong) that it can be done in ggplot2 . This is probably an easy one... at least it seems easy. Here's the code: p <- ggplot(mtcars) p + aes(factor(cyl)) + geom_bar() Is there any chance that I can get frequencies embedded in the graph? geom_text is tha analog of text from base graphics: p + geom_bar() + stat_bin(aes(label=..count..), vjust=0, geom="text", position="identity") If you want to adjust the y-position of