Example usage for java.lang Math log10

Introduction

In this page you can find the example usage for java.lang Math log10.

Prototype

@HotSpotIntrinsicCandidate
public static double log10(double a) 

Source Link

Document

Returns the base 10 logarithm of a double value.

Usage

From source file:Main.java

public static void main(String[] args) {
    double x = 123456.7;
    double y = -123.45;

    // get the base 10 logarithm for x
    System.out.println("Math.log10(" + x + ")=" + Math.log10(x));

    // get the base 10 logarithm for y
    System.out.println("Math.log10(" + y + ")=" + Math.log10(y));

}

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From source file:Main.java

public static void main(String[] args) {
    int a = 10;/*from ww  w.j a va  2  s . c om*/
    int b = -50;
    int c = 3;
    double x = 25.0;
    double y = 3.0;
    double z = 4.0;

    System.out.println("abs(b)     = " + Math.abs(b));
    System.out.println("cbrt(x)   = " + Math.cbrt(x));
    System.out.println("exp(y)     = " + Math.exp(z));
    System.out.println("hypot(y, z)= " + Math.hypot(y, z));

    System.out.println("log(y)    = " + Math.log(y));
    System.out.println("log10(y)  = " + Math.log10(y));
    System.out.println("max(a, b) = " + Math.max(a, b));
    System.out.println("min(a, b) = " + Math.min(a, b));
    System.out.println("pow(a, c) = " + Math.pow(a, c));
    System.out.println("random()  = " + Math.random());
    System.out.println("signum(b) = " + Math.signum(b));
    System.out.println("sqrt(x)   = " + Math.sqrt(y));
}

---

From source file:com.guns.media.tools.yuv.MediaTool.java

/**
 * @param args the command line arguments
 *///from  w w w  .ja  va  2 s  . co  m
public static void main(String[] args) throws IOException {

    try {
        Options options = getOptions();
        CommandLine cmd = null;
        int offset = 0;
        CommandLineParser parser = new GnuParser();
        cmd = parser.parse(options, args);

        if (cmd.hasOption("help")) {
            printHelp(options);
            exit(1);
        }

        if (cmd.hasOption("offset")) {
            offset = new Integer(cmd.getOptionValue("offset"));
        }
        int frame = new Integer(cmd.getOptionValue("f"));

        //  int scale = new Integer(args[2]);
        BufferedInputStream if1 = new BufferedInputStream(new FileInputStream(cmd.getOptionValue("if1")));
        BufferedInputStream if2 = new BufferedInputStream(new FileInputStream(cmd.getOptionValue("if2")));

        DataStorage.create(new Integer(cmd.getOptionValue("f")));

        int width = new Integer(cmd.getOptionValue("w"));
        int height = new Integer(cmd.getOptionValue("h"));
        LookUp.initSSYUV(width, height);
        //  int[][] frame1 = new int[width][height];
        //  int[][] frame2 = new int[width][height];
        int nRead;
        int fRead;
        byte[] data = new byte[width * height + ((width * height) / 2)];
        byte[] data1 = new byte[width * height + ((width * height) / 2)];
        int frames = 0;
        long start_ms = System.currentTimeMillis() / 1000L;
        long end_ms = start_ms;

        if (offset > 0) {
            if1.skip(((width * height + ((width * height) / 2)) * offset));
        } else if (offset < 0) {
            if2.skip(((width * height + ((width * height) / 2)) * (-1 * offset)));
        }

        if (cmd.hasOption("psnr")) {
            ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
            while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) {
                byte[] data_out = data.clone();
                byte[] data1_out = data1.clone();

                PSNRCalculatorThread wt = new PSNRCalculatorThread(data_out, data1_out, frames, width, height);
                executor.execute(wt);
                frames++;

            }
            executor.shutdown();
            end_ms = System.currentTimeMillis();

            System.out.println("Frame Rate :" + frames * 1000 / ((end_ms - start_ms)));
            for (int i = 0; i < frames; i++) {
                System.out.println(
                        i + "," + 10 * Math.log10((255 * 255) / (DataStorage.getFrame(i) / (width * height))));

            }
        }
        if (cmd.hasOption("sub")) {

            RandomAccessFile raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw");

            ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
            while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1)) {
                byte[] data_out = data.clone();
                byte[] data1_out = data1.clone();

                ImageSubstractThread wt = new ImageSubstractThread(data_out, data1_out, frames, width, height,
                        raf);
                //wt.run();
                executor.execute(wt);

                frames++;

            }
            executor.shutdown();
            end_ms = System.currentTimeMillis() / 1000L;
            System.out.println("Frame Rate :" + frames / ((end_ms - start_ms)));

            raf.close();
        }
        if (cmd.hasOption("ss") && !cmd.getOptionValue("o").matches("-")) {

            RandomAccessFile raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw");

            // RandomAccessFile ra =  new RandomAccessFile(cmd.getOptionValue("o"), "rw");
            // MappedByteBuffer raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, ((width*height)+(width*height/2))*frame);
            ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
            while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) {
                byte[] data_out = data.clone();
                byte[] data1_out = data1.clone();

                SidebySideImageThread wt = new SidebySideImageThread(data_out, data1_out, frames, width, height,
                        raf);
                // MPSidebySideImageThread wt = new MPSidebySideImageThread(data_out, data1_out, frames, width, height, ra);
                frames++;
                // wt.run();

                executor.execute(wt);
            }
            executor.shutdown();
            end_ms = System.currentTimeMillis() / 1000L;

            while (!executor.isTerminated()) {

            }

            raf.close();
        }
        if (cmd.hasOption("ss") && cmd.getOptionValue("o").matches("-")) {

            PrintStream stdout = new PrintStream(System.out);

            // RandomAccessFile ra =  new RandomAccessFile(cmd.getOptionValue("o"), "rw");
            // MappedByteBuffer raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, ((width*height)+(width*height/2))*frame);
            // ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
            while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) {
                byte[] data_out = data.clone();
                byte[] data1_out = data1.clone();

                SidebySideImageThread wt = new SidebySideImageThread(data_out, data1_out, frames, width, height,
                        stdout);
                // MPSidebySideImageThread wt = new MPSidebySideImageThread(data_out, data1_out, frames, width, height, ra);
                frames++;
                // wt.run();

                wt.run();
            }

            end_ms = System.currentTimeMillis() / 1000L;
            System.out.println("Frame Rate :" + frames / ((end_ms - start_ms)));

            stdout.close();
        }
        if (cmd.hasOption("image")) {

            System.setProperty("java.awt.headless", "true");
            //ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool();
            ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(10);
            while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1)) {

                if (frames == frame) {
                    byte[] data_out = data.clone();
                    byte[] data1_out = data1.clone();

                    Frame f1 = new Frame(data_out, width, height, Frame.YUV420);
                    Frame f2 = new Frame(data1_out, width, height, Frame.YUV420);
                    //       System.out.println(cmd.getOptionValue("o"));
                    ExtractImageThread wt = new ExtractImageThread(f1, frames,
                            cmd.getOptionValue("if1") + "frame1-" + cmd.getOptionValue("o"));
                    ExtractImageThread wt1 = new ExtractImageThread(f2, frames,
                            cmd.getOptionValue("if2") + "frame2-" + cmd.getOptionValue("o"));
                    //   executor.execute(wt);
                    executor.execute(wt);
                    executor.execute(wt1);
                }
                frames++;

            }
            executor.shutdown();
            //  executor.shutdown();
            end_ms = System.currentTimeMillis() / 1000L;
            System.out.println("Frame Rate :" + frames / ((end_ms - start_ms)));
        }

    } catch (ParseException ex) {
        Logger.getLogger(MediaTool.class.getName()).log(Level.SEVERE, null, ex);
    }
}

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From source file:cc.twittertools.search.api.RunQueriesBaselineThrift.java

@SuppressWarnings("static-access")
public static void main(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("string").hasArg().withDescription("host").create(HOST_OPTION));
    options.addOption(OptionBuilder.withArgName("port").hasArg().withDescription("port").create(PORT_OPTION));
    options.addOption(OptionBuilder.withArgName("file").hasArg()
            .withDescription("file containing topics in TREC format").create(QUERIES_OPTION));
    options.addOption(OptionBuilder.withArgName("num").hasArg().withDescription("number of results to return")
            .create(NUM_RESULTS_OPTION));
    options.addOption(// w  w  w  .  j a  v  a 2  s  .  c  o m
            OptionBuilder.withArgName("string").hasArg().withDescription("group id").create(GROUP_OPTION));
    options.addOption(
            OptionBuilder.withArgName("string").hasArg().withDescription("access token").create(TOKEN_OPTION));
    options.addOption(
            OptionBuilder.withArgName("string").hasArg().withDescription("runtag").create(RUNTAG_OPTION));
    options.addOption(new Option(VERBOSE_OPTION, "print out complete document"));

    CommandLine cmdline = null;
    CommandLineParser parser = new GnuParser();
    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        System.exit(-1);
    }

    if (!cmdline.hasOption(HOST_OPTION) || !cmdline.hasOption(PORT_OPTION)
            || !cmdline.hasOption(QUERIES_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(RunQueriesThrift.class.getName(), options);
        System.exit(-1);
    }

    String queryFile = cmdline.getOptionValue(QUERIES_OPTION);
    if (!new File(queryFile).exists()) {
        System.err.println("Error: " + queryFile + " doesn't exist!");
        System.exit(-1);
    }

    String runtag = cmdline.hasOption(RUNTAG_OPTION) ? cmdline.getOptionValue(RUNTAG_OPTION) : DEFAULT_RUNTAG;

    TrecTopicSet topicsFile = TrecTopicSet.fromFile(new File(queryFile));

    int numResults = 1000;
    try {
        if (cmdline.hasOption(NUM_RESULTS_OPTION)) {
            numResults = Integer.parseInt(cmdline.getOptionValue(NUM_RESULTS_OPTION));
        }
    } catch (NumberFormatException e) {
        System.err.println("Invalid " + NUM_RESULTS_OPTION + ": " + cmdline.getOptionValue(NUM_RESULTS_OPTION));
        System.exit(-1);
    }

    String group = cmdline.hasOption(GROUP_OPTION) ? cmdline.getOptionValue(GROUP_OPTION) : null;
    String token = cmdline.hasOption(TOKEN_OPTION) ? cmdline.getOptionValue(TOKEN_OPTION) : null;

    boolean verbose = cmdline.hasOption(VERBOSE_OPTION);

    PrintStream out = new PrintStream(System.out, true, "UTF-8");

    TrecSearchThriftClient client = new TrecSearchThriftClient(cmdline.getOptionValue(HOST_OPTION),
            Integer.parseInt(cmdline.getOptionValue(PORT_OPTION)), group, token);

    for (cc.twittertools.search.TrecTopic query : topicsFile) {
        List<TResult> results = client.search(query.getQuery(), query.getQueryTweetTime(), numResults);

        SortedSet<TResultComparable> sortedResults = new TreeSet<TResultComparable>();
        for (TResult result : results) {
            // Throw away retweets.
            if (result.getRetweeted_status_id() == 0) {
                sortedResults.add(new TResultComparable(result));
            }
        }

        int i = 1;
        int dupliCount = 0;
        double rsvPrev = 0;
        for (TResultComparable sortedResult : sortedResults) {
            TResult result = sortedResult.getTResult();
            double rsvCurr = result.rsv;
            if (Math.abs(rsvCurr - rsvPrev) > 0.0000001) {
                dupliCount = 0;
            } else {
                dupliCount++;
                rsvCurr = rsvCurr - 0.000001 / numResults * dupliCount;
            }
            out.println(String.format("%s Q0 %d %d %." + (int) (6 + Math.ceil(Math.log10(numResults))) + "f %s",
                    query.getId(), result.id, i, rsvCurr, runtag));
            if (verbose) {
                out.println("# " + result.toString().replaceAll("[\\n\\r]+", " "));
            }
            i++;
            rsvPrev = result.rsv;
        }

    }
    out.close();
}

---

From source file:Main.java

public static float log10(float x) {
    return (float) Math.log10(x);
}

---

From source file:Main.java

public static double calculateIndoorDistance(double level, double freq) {
    double exp = (27.55d - 40d * Math.log10(freq) + 6.7d - level) / 20.0d;
    return Math.pow(10.0d, exp);
}

---

From source file:Main.java

/**
 * rounds the given number to the next significant number
 *
 * @param number// w ww  .j a  v  a  2  s  . co  m
 * @return
 */
public static float roundToNextSignificant(double number) {
    final float d = (float) Math.ceil((float) Math.log10(number < 0 ? -number : number));
    final int pw = 1 - (int) d;
    final float magnitude = (float) Math.pow(10, pw);
    final long shifted = Math.round(number * magnitude);
    return shifted / magnitude;
}

---

From source file:Main.java

public static String readableFileSize(long size) {
    if (size <= 0)
        return "0";
    final String[] units = new String[] { "B", "KB", "MB", "GB", "TB" };
    int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
    return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
}

---

From source file:Main.java

public static String readableFileSize(long size) {
    if (size <= 0)
        return "0";
    final String[] units = new String[] { "B", "kB", "MB", "GB", "TB" };
    int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
    return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
}

---

From source file:Main.java

public static String readableFileSize(long size) {
    if (size <= 0)
        return "0KB";
    final String[] units = new String[] { "B", "KB", "MB", "GB", "TB" };
    int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
    return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
}

---

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