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Yahoo Weather : Some classes to make it easier to get what you want

[0 Replies]
- 14-Jul-2013 09:27 AM
- Forum: Share your Work
//hey folks I just put this together for something I was making - it's a pretty simple thing to do but I'm sure this job gets repeated a lot so thought I'd post it- please let me have any criticism or corrections

//yahoo_weather_example Copyright (C) <2012> <Tom Schofield>

//

// This program is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// This program is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

//GNU General Public License for more details.

//

//You should have received a copy of the GNU General Public License

//along with this program. If not, see < http://www.gnu.org/licenses/>

YahooWeather weather;

void setup() {

size(100, 100);

// Make a WeatherGrabber object

//you can find woeids at http://isithackday.com/geoplanet-explorer/index.php?woeid=560743

String glasgowWOEID ="22465834";

String dublinWOEID ="560743";

String skegnessWOEID ="34892";

String genovaWOEID ="712516";

//make a new weather object with this WOEID

weather = new YahooWeather(skegnessWOEID);

// Tell it to request the weather

weather.getWeather();

//here's what you can get

String weatherReport ="title is: ";

weatherReport+=weather.getTitle();

weatherReport+="\nlat is: ";

weatherReport+=str(weather.getLatLong().x);

weatherReport+="\nlong is: ";

weatherReport+=str(weather.getLatLong().y);

weatherReport+="\npubdate is:";

weatherReport+=weather.getPubDate();

weatherReport+="\nweather code for today is; ";

weatherReport+=str(weather.getTodaysCode());

weatherReport+="\ntoday's data is: ";

weatherReport+=weather.getTodaysDate();

weatherReport+="\ntoday's temp is: ";

weatherReport+=str(weather.getTodaysTemp());

weatherReport+="\ntoday's weather is: ";

weatherReport+=weather.getTodaysText();

weatherReport+="\ntommorw's code is: ";

weatherReport+=str(weather.getForecastCode(1));

weatherReport+="\ntommorw's date is: ";

weatherReport+=weather.getForecastDate(1);

weatherReport+="\ntommorw's day is: ";

weatherReport+=weather.getForecastDay(1);

weatherReport+="\ntommorw's high is: ";

weatherReport+=str(weather.getForecastHigh(1));

weatherReport+="\ntommorw's low is: ";

weatherReport+=str(weather.getForecastLow(1));

weatherReport+="\ntommorw's weather is: ";

weatherReport+=weather.getForecastText(1);



println(weatherReport);

}

//functions for todays weather

int getTodaysCode() {

return yWeathers[0].getCode();

}

String getTodaysDate() {

return yWeathers[0].getDate();

}

int getTodaysTemp() {

return yWeathers[0].getTemp();

}

String getTodaysText() {

return yWeathers[0].getText();

}





//functions for forecast weather

int getForecastCode(int numDaysAhead) {

return yWeathers[numDaysAhead].getCode();

}

String getForecastDate(int numDaysAhead) {

return yWeathers[numDaysAhead].getDate();

}

String getForecastDay(int numDaysAhead) {

return yWeathers[numDaysAhead].getDay();

}

int getForecastHigh(int numDaysAhead) {

return yWeathers[numDaysAhead].getHigh();

}

int getForecastLow(int numDaysAhead) {

return yWeathers[numDaysAhead].getLow();

}

String getForecastText(int numDaysAhead) {

return yWeathers[numDaysAhead].getText();

}

}

class YWeather{

//example contents code="32" date="13 Jul 2013" day="Sat" high="84" low="68" text="Sunny"

int code;

String date;

String day;

int high;

int low;

String text;

int temp;

boolean isForecast;

YWeather(int _code,String _date,String _day,int _high, int _low, String _text, int _temp, boolean _isForecast){

code=_code;

date=_date;

day =_day;

high=_high;

low=_low;

text=_text;

temp=_temp;

isForecast = _isForecast;

}

int getCode(){

return code;

}

String getDate(){

return date;

}

String getDay(){

return day;

}

int getHigh(){

return high;

}

int getLow(){

return low;

}

String getText(){

return text;

}

int getTemp(){

return temp;

}







}

resize() larger

[5 Replies]
- 26-Jan-2013 03:57 AM
- Forum: Programming Questions
Hi folks,

A simple question: Is resize() supposed to be able to make images larger or not? The below code causes the code to apparently not compile. There is no error in the console but the app window doesn't open. Changing to resize smaller or commenting the line causes it to work fine. The reference makes no mention of this restriction. Thanks, Tom

PImage test;

void setup() {

size(355, 355);

test=loadImage("1.png");

test.resize(test.width*2, test.height*2);

}

void draw() {

image(test, 0, 0);

}

Heatmap using Inverse Distance Weighted Interpolation solution

[4 Replies]
- 05-Nov-2012 04:21 AM
- Forum: Share your Work
Hi all

in this thread I asked about good implementations for heatmapping. Well I did some digging and the below is my implementation of Shepard's method. It is based on the explanation from this excellent site so most credit is to the authors there.

Please use and improve!

Tom

//A processing.org implementation of SHEPARD's METHOD for INVERSE DISTANCE WEIGHTING FOLLOWING FORMULA FOUND AT http://www.ems-i.com/smshelp/Data_Module/Interpolation/Inverse_Distance_Weighted.htm

//TOMSCHOFIELDART.COM THIS CODE IS FREE UNDER CREATIVE COMMONS NON COMMERCIAL ATTRIBUTION SHARE ALIKE 2012

//this pimage will hold our heatmap

PImage mapImage;

PFont font;

float [] _xs;

float [] _ys;

float [] _f;

//an arbitary number of data points

int numDataPoints = 10;

void setup() {

size(800, 600);

colorMode(HSB);

font =loadFont("AppleBraille-14.vlw");

textFont (font, 14);



//make some random data points

_xs = new float[numDataPoints];

_ys = new float[numDataPoints];

_f = new float[numDataPoints];

for (int i=0;i<numDataPoints;i++) {

_xs[i]=random(width);

_ys[i]=random(height);

_f[i]=random(1.0);

}

mapImage=makeHeatMap();

}

void draw() {





image(mapImage, 0, 0);



for (int i=0;i<numDataPoints;i++) {

text(str(_f[i]), _xs[i], _ys[i]);

}

}

//returns the a pimage of screen size

PImage makeHeatMap() {

PImage timg=createImage(width, height, RGB);

timg.loadPixels();

loadPixels();



//maxpossible distance between any 2 pixels is the diagonal distance across the screen

float maxDist = sqrt((width*width)+(height*height));

float heats[] =new float[pixels.length];

float x=0.0f;

float y=0.0f;

for (int i=0;i<pixels.length;i++) {

float _hue=getInterpValue( x, y, _xs, _ys, _f);

color aColor=color(255-(255*_hue),255,255);

timg.pixels[i]= aColor;

x++;

if (x>=width) {

x=0;

y++;

}

}

timg.updatePixels();

return timg;

}

//ITERATES THROUGH ALL THE DATA POINTS AND FINDS THE FURTHERS ONE

float getMaxDistanceFromPoint(float x, float y, float [] xs, float [] ys) {

float maxDistance=0.0f;

//get disance between this and each pther point

for (int i=0;i<xs.length;i++) {

float thisDist=dist(x, y, xs[i], ys[i]);

//if this distance is greater than previous distances, this is the new max

if (thisDist>maxDistance) {

maxDistance=thisDist;

}

}

return maxDistance;

}

//RETURNS AN ARRAY OF THE DISTANCE BETWEEN THIS PIXEL AND ALL DATA POINTS

float [] getAllDistancesFromPoint(float x, float y, float [] xs, float [] ys) {

float [] allDistances = new float [xs.length];

for (int i=0;i<xs.length;i++) {

allDistances[i]= dist(x, y, xs[i], ys[i]);

}



return allDistances;

}

//RETURNS THE ACTUAL WEIGHTED VALUE FOR THIS PIXEL

float getInterpValue(float x, float y, float [] xs, float [] ys, float f[]) {

float interpValue=0.0f;

for (int i=0;i<xs.length;i++) {

float maxDist = getMaxDistanceFromPoint( x, y, xs, ys);

float [] allDistances = getAllDistancesFromPoint( x, y, xs, ys);

float thisDistance = dist(x, y, xs[i], ys[i]);

interpValue += f[i]*getWeight( maxDist, thisDistance, allDistances );

}

return interpValue;

}

//THE WEIGHT IS THE VALUE COEFFICIENT (? RIGHT TERM) BY WHICH WE WILL MULTIPLY EACH VALUE TO GET THE CORRECT WEIGHTING

float getWeight(float maxDistance, float thisDistance, float [] allDistances ) {

float weight=0.0f;

float firstTerm = pow(((maxDistance - thisDistance )/( maxDistance * thisDistance )), 2);

float secondTerm=0.0f;

for (int i=0;i<allDistances.length;i++) {

secondTerm+=pow(((maxDistance - allDistances[i] )/( maxDistance * allDistances[i] )), 2);

}

weight = firstTerm/secondTerm;

return weight;

}

Heat map optimisation

[3 Replies]
- 19-Oct-2012 04:19 AM
- Forum: Programming Questions
Hi guys,

I wrote the below heat mapping function. It works reasonably well but sometimes gives me an out of memory error. I wonder is anyone has any suggestions for optimisation. I'm also controlling the fall off of the points a bit brutally with a multiplier (called fallOff). I wonder if this should also be some kind of logarithmic function? Cheers folks, hopefully this thread will expand a bit and we can get good solid simple solution!

cheers

Tom

PImage makeHeatMap(PVector [] dataPoints, float fallOff) {

PImage timg=createImage(width, height, RGB);

timg.loadPixels();

loadPixels();

dataPoints[0].x=mouseX;

dataPoints[0].y=mouseY;

//maxpossible distance between any 2 pixels is the diagonal distance across the screen

float maxDist = sqrt((width*width)+(height*height));

float heats[] =new float[pixels.length];

int x=0;

int y=0;

for (int i=0;i<pixels.length;i++) {

//get average distance to all points

float averageDistance=0.0f;

for (int j=0;j< dataPoints.length;j++) {

float thisDist=dist(x, y, dataPoints[j].x, dataPoints[j].y) ;

//multiply the distance by the scaler

averageDistance+=thisDist*dataPoints[j].z;

//float _hue =(1.0f/7.0f)* map(sqrt(thisDist), 0, sqrt(maxDist), 0, 255);

}

averageDistance/=dataPoints.length;

float _hue = map (sqrt(averageDistance), 0, sqrt(maxDist)*fallOff, 0, 255);

timg.pixels[i]= color(_hue, 255, 255);

x++;

if (x>=width) {

x=0;

y++;

}

}

timg.updatePixels();

return timg;

}

hue() returns unpredictable results

[3 Replies]
- 28-Jul-2012 05:43 AM
- Forum: Programming Questions
Hi everyone.

I'm working on a sketch which is about encoding books as sequences of colours where each pixel value corresponds to a single char from the text. So 'a' gives a hue value of 97 for example. In my sketch I set the colorMode(HSB, 255) then populate part of the pixels array with the char values from a string. What's happening though is that when I read the values back out of the pixels array some of them are correct but some aren't. For example a sequence of chars which should read 'projects' reads 'prnjdbtr'. So some characters are correct but some are out by -1. I assume that this must be something to do with the setting for colorMode()? What's very confusing is that if I try the same process in RGB space and extract the red channel it works perfectly. I must be missing something obvious but if anyone could give me a nudge I'd really appreciate it. Code below.

String msg;

boolean useHue=true;

void setup() {

size(500, 500);

//load some text - content isn't important in this context

msg= "It has been a decade since Will Holland aka Quantic released his first album on Tru Thoughts. Twelve albums later and Quantic has a vast discography; funky, soulful vibes with the Quantic Soul Orchestra, Flowering Inferno's reggae infused dub, cumbia with The Combo Barbaro, and more. The Best Of Quantic album highlights the stunning range of his work, bringing together some of the biggest tracks from across his many projects.";

if (useHue) colorMode(HSB, 255);

}

void draw() {

background(0);

int x=0;

int y=0;

//set pixels with char values from the string, the sketch encodes text as a hue values

loadPixels();

for (int i=0;i<msg.length();i++) {

color aColor =color(msg.charAt(i), 255, 255);

pixels[i]=aColor;

}

updatePixels();

x=0;

y=0;

loadPixels();

for (int i=0;i<msg.length();i++) {

//get the colour at this pixel index - this SHOULD be the same as the char value of msg at the same index.

color aColor= pixels[i];

//here's the weird thing - in RGB colour space this works (by extracting the red channel ) but if we use hue then SOME of the char values come out as you'd expect but some have a char value of one less than the should be! eek! any thoughts?

if (useHue) {

println(i+ " value from pixels array: "+(char)hue(aColor)+ " value from original string "+msg.charAt(i));

}

else {

println(i+ " value from pixels array: "+(char)red(aColor)+ " value from original string "+msg.charAt(i));

}

}

updatePixels();

}

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