Updated package.json and added tests

package.json:
- Updated version to 1.8.0-alpha
- Updated description
- Added more keywords

Added tests for multitaper

Updated test name and description for bandpower

Removed auto generated files src/modules.js and src/modules_browser.js
and added them to gitignore

Author: pwstegman

.gitignore

@@ -60,11 +60,13 @@ typings/
 # visual studio
 .vs/
 
-# build files
+# build and auto generated files
 build/
 test/browser/bci.js
 test/browser/bci.min.js
 test/browser/bci.test.js
+src/modules.js
+src/modules_browser.js
 
 # data files
 examples/node/data/

browser.js

@@ -1,2 +1,3 @@
 // Now at ./lib/browser.js
+// Run 'npm run build' to generate lib files
 module.exports = require('./lib/browser');

index.js

@@ -1,2 +1,3 @@
 // Now at ./lib/index.js
+// Run 'npm run build' to generate lib files
 module.exports = require('./lib/index');

package.json

@@ -1,7 +1,7 @@
 {
   "name": "bcijs",
-  "version": "1.7.0",
-  "description": "EEG signal processing and machine learning",
+  "version": "1.8.0-alpha",
+  "description": "BCI.js - Brain Computer Interfaces (BCIs) with JavaScript",
   "main": "lib/index.js",
   "module": "src/index.js",
   "scripts": {
@@ -47,13 +47,22 @@
     "url": "git+https://github.com/pwstegman/bcijs.git"
   },
   "keywords": [
-    "eeg",
     "bci",
     "bci.js",
+    "eeg",
     "signal processing",
-    "machine learning",
+    "DSP",
+    "spectral estimation",
+    "signal separation",
+    "bandpower",
+    "multitaper",
+    "welch",
+    "periodogram",
+    "ICA",
+    "CSP",
+    "LDA",
     "math",
-    "DSP"
+    "machine learning"
   ],
   "bugs": {
     "url": "https://github.com/pwstegman/bcijs/issues"

src/browser.js

@@ -1,5 +1,6 @@
 /** @module bcijs */
 // All import of individual BCI.js modules
+// Run 'npm run build' to generate ./browser_modules.js
 export * from './browser_modules';
 
 // All import of BCI.js as default

src/index.js

@@ -1,5 +1,6 @@
 /** @module bcijs */
 // All import of individual BCI.js modules
+// Run 'npm run build' to generate ./modules.js
 export * from './modules';
 
 // All import of BCI.js as default

src/modules.js

@@ -0,0 +1,22 @@
+describe('multitaper', function(){
+    it('Computes the power spectral density of a signal', function(){
+        // Signal (32 samples long)
+        let x = [0.27,0.54,0.43,0.46,0.06,0.37,0.97,0.22,0.08,0.83,0.79,0.98,0.73,0.49,0.04,0.4,0.26,0.46,0.07,0.38,0.11,0.78,0.26,0.17,0.32,0.97,0.03,0.08,0.37,0.07,0.61,0.27];
+        let sample_rate = 64;
+
+        // Compute multitaper (default params)
+        let psd = bci.multitaper(x, sample_rate);
+        let expected_pxx = [0.0127282452106786,0.024727368535190867,0.025121173974541972,0.025384032844579171,0.0056547434502981116,0.0034205696043726344,0.0032025831988853433,0.0031721065186386477,0.003231378133615583,0.0032700656223051188,0.0032801216156986232,0.0023135118150775622,0.0027121444114110143,0.0028026827880422165,0.0027637786332570572,0.0021800493363373255,0.000891820792920708];
+        let expected_freqs = [0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32];
+
+        assert(arrayAlmostEqual(psd.estimates, expected_pxx));
+        assert.deepStrictEqual(psd.frequencies, expected_freqs);
+
+        // Custom time half bandwidth
+        psd = bci.multitaper(x, sample_rate, {nw: 2.5});
+        expected_pxx = [0.020485359804241408,0.038110105409394891,0.030809159686379074,0.0027335514670587041,0.0021105763830891865,0.0040981884381232443,0.0033094527580004402,0.0039662940285911975,0.0041332810413194591,0.0033060411536415014,0.0034051016200936286,0.0029068549177303626,0.0027728950780877958,0.0013456054957858654,0.0023225236830690214,0.0026835018162150856,0.0013526533407485139];
+
+        assert(arrayAlmostEqual(psd.estimates, expected_pxx));
+        assert.deepStrictEqual(psd.frequencies, expected_freqs);
+    });
+});