arrays - javascript assigning wrong values to variables -

arrays - javascript assigning wrong values to variables -

for reason javascript doesn't seem calculate , keeps giving me infinity array values.

var stock = { "data": { "portfolio": [ [1298641715000, 1631.00], [1298656616000, 1311.00], [1299606578000, 1311.00], [1300381305000, 820.50], [1300813418000, 2074.80], [1300970915000, 3862.50], [1300985378000, 4597.35], [1301071778000, 3554.85], [1301505492000, 5653.05], [1302195878000, 4871.80], [1302368766000, 4079.80], [1306343616000, 5062.60], [1307036495000, 5062.60], [1307726770000, 7207.60], [1307727695000, 6372.60], [1312998095000, 5816.10], [1313430095000, 5816.10], [1316625492000, 7816.10], [1316711892000, 6566.10], [1316713295000, 7777.10], [1316713295000, 8921.60], [1316799695000, 10902.10], [1316886095000, 8627.10], [1318094770000, 7717.10], [1318267163000, 6807.10], [1326306370000, 8228.30], [1327429500000, 9228.30], [1328208664000, 10222.05], [1329503831000, 10188.65], [1330368095000, 11274.15], [1330541464000, 12006.75], [1330714264000, 13222.25], [1331059408000, 14029.75], [1331144806000, 15676.55], [1333648264000, 17256.02], [1334080424000, 18701.62], [1336672860000, 19745.42], [1336758824000, 20018.77], [1336773969000, 21130.77], [1337015320000, 20312.47], [1337277827000, 21650.02], [1339002758000, 22285.97], [1341934145000, 23972.67], [1341934243000, 24182.67], [1342103859000, 25830.67], [1342475250000, 25380.67], [1342654950000, 25669.09], [1343147542000, 25797.43], [1343412475000, 25994.43], [1343658668000, 26203.43], [1343804523000, 26342.43], [1343840755000, 26432.43], [1343922704000, 25914.43], [1343922759000, 26031.43], [1345053816000, 26156.43], [1345138832000, 26253.43], [1345576479000, 26483.43], [1345576537000, 26588.43], [1345656708000, 26628.43], [1346442006000, 26704.43], [1346953652000, 26456.43], [1347553896000, 26586.43], [1347554286000, 26865.43], [1347559351000, 27062.43], [1347560040000, 27533.43], [1347560369000, 27351.43], [1347641968000, 26577.43], [1348063653000, 26860.43], [1348591198000, 26588.43], [1348591500000, 26598.43], [1348668767000, 26728.43], [1348681823000, 27094.43], [1349367062000, 27254.43], [1349368159000, 27379.43], [1350310748000, 27675.43], [1350503445000, 27858.43], [1350923279000, 27979.43], [1352131960000, 27742.43], [1353522221000, 27997.43], [1353685832000, 28299.43], [1355157961000, 28545.43], [1355766797000, 28692.43], [1355947837000, 28913.43], [1357671266000, 29304.43], [1357672054000, 29531.44], [1358448645000, 28856.44], [1358448738000, 29036.44], [1358455579000, 29236.44], [1358540610000, 29430.44], [1360095697000, 30077.44], [1360596277000, 30154.44], [1360612771000, 30651.44], [1360860220000, 30789.44], [1360869993000, 31389.44] ], "portfolio2": [ [1298641715000, 1631.00], [1298656616000, 1311.00], [1299606578000, 1311.00], [1300381305000, 820.50], [1300813418000, 2074.80], [1300970915000, 3862.50], [1300985378000, 4597.35], [1301071778000, 3554.85], [1301505492000, 5653.05], [1302195878000, 4871.80], [1302368766000, 4079.80], [1306343616000, 5062.60], [1307036495000, 5062.60], [1307726770000, 7207.60], [1307727695000, 6372.60], [1312998095000, 5816.10], [1313430095000, 5816.10], [1316625492000, 7816.10], [1316711892000, 6566.10], [1316713295000, 7777.10], [1316713295000, 8921.60], [1316799695000, 10902.10], [1316886095000, 8627.10], [1318094770000, 7717.10], [1318267163000, 6807.10], [1326306370000, 8228.30], [1327429500000, 9228.30], [1328208664000, 10222.05], [1329503831000, 10188.65], [1330368095000, 11274.15], [1330541464000, 12006.75], [1330714264000, 13222.25], [1331059408000, 14029.75], [1331144806000, 15676.55], [1333648264000, 17256.02], [1334080424000, 18701.62], [1336672860000, 19745.42], [1336758824000, 20018.77], [1336773969000, 21130.77], [1337015320000, 20312.47], [1337277827000, 21650.02], [1339002758000, 22285.97], [1341934145000, 23972.67], [1341934243000, 24182.67], [1342103859000, 25830.67], [1342475250000, 25380.67], [1342654950000, 25669.09], [1343147542000, 25797.43], [1343412475000, 25994.43], [1343658668000, 26203.43], [1343804523000, 26342.43], [1343840755000, 26432.43], [1343922704000, 25914.43], [1343922759000, 26031.43], [1345053816000, 26156.43], [1345138832000, 26253.43], [1345576479000, 26483.43], [1345576537000, 26588.43], [1345656708000, 26628.43], [1346442006000, 26704.43], [1346953652000, 26456.43], [1347553896000, 26586.43], [1347554286000, 26865.43], [1347559351000, 27062.43], [1347560040000, 27533.43], [1347560369000, 27351.43], [1347641968000, 26577.43], [1348063653000, 26860.43], [1348591198000, 26588.43], [1348591500000, 26598.43], [1348668767000, 26728.43], [1348681823000, 27094.43], [1349367062000, 27254.43], [1349368159000, 27379.43], [1350310748000, 27675.43], [1350503445000, 27858.43], [1350923279000, 27979.43], [1352131960000, 27742.43], [1353522221000, 27997.43], [1353685832000, 28299.43], [1355157961000, 28545.43], [1355766797000, 28692.43], [1355947837000, 28913.43], [1357671266000, 29304.43], [1357672054000, 29531.44], [1358448645000, 28856.44], [1358448738000, 29036.44], [1358455579000, 29236.44], [1358540610000, 29430.44], [1360095697000, 30077.44], [1360596277000, 30154.44], [1360612771000, 30651.44], [1360860220000, 30789.44], [1360869993000, 31389.44] ], "standard": [] } }; var stockbase = stock.data.portfolio; var stock1 = stock.data.portfolio2; (i = 0; < (stock.data.portfolio2.length); i++) { stock.data.portfolio2[i][1] = stock.data.portfolio2[i][1] * math.random(); } //var performance1 = stock.data.portfolio2; var = 0; while(i<stockbase.length) { if (i == 0){ stock1[i][0] = stockbase[i][0]; stock1[i][1] = 0; } else if (stockbase[i][1] > stockbase[(i - 1)][1]) { stock1[i][0] = stockbase[i][0]; stock1[i][1] = (stockbase[i][1]) / (stockbase[(i - 1)][1]); stock1[i][1] -= 1; stock1[i][1] *= 100; } else if (stockbase[i][1] < stockbase[(i - 1)][1]) { stock1[i][0] = stockbase[i][0]; stock1[i][1] = ((stockbase[i][1]) / (stockbase[(i-1)][1])); stock1[i][1] -= 1; stock1[i][1] *= 100; } else { stock1[i][0] = stockbase[i][0]; stock1[i][1] = 0; } i++; } //console.log(stockbase); //console.log(stock1); var stockbase = stock.data.portfolio2; var stock2 = stock.data.portfolio; = 0; while(i<stockbase.length) { if (i == 0){ stock2[i][0] = stockbase[i][0]; stock2[i][1] = 0; } else if (stockbase[i][1] > stockbase[(i - 1)][1]) { stock2[i][0] = stockbase[i][0]; stock2[i][1] = (stockbase[i][1]) / (stockbase[(i - 1)][1]); stock2[i][1] -= 1; stock2[i][1] *= 100; } else if (stockbase[i][1] < stockbase[(i - 1)][1]) { stock2[i][0] = stockbase[i][0]; stock2[i][1] = ((stockbase[i][1]) / (stockbase[(i-1)][1])); stock2[i][1] -= 1; stock2[i][1] *= 100; } else { stock2[i][0] = stockbase[i][0]; stock2[i][1] = 0; } i++; } console.log(stockbase); console.log(stockbase==stock.data.portfolio2);

the variable stock 1 works after loop without problems. interesting part after first while loop, stock.data.portfolio2 has same array values stock1 though no changes supposed made stock.data.portfolio2.

i'm confused on i'm doing wrong.

when doing following:

var stock1 = stock.data.portfolio2;

you assigning stock1 reference of array stock.data.portfolio2. means changes made stock.data.portfolio2 seen in stock1. since stock.data.portfolio2 array of arrays recommend creating function re-create info variable stock1

function copyportfolio(arr) { var s = []; for(i = 0; < (arr.length); i++) { s.push(arr[i].slice()); } homecoming s; } var stock1 = copyportfolio(stock.data.portfolio2);

javascript arrays json math random