http - MathStudio Manual

http(url, [filter])

[filter]

A list of keys to filter from the data.

Description

Parses JSON data from a URL.

Examples

// stock data from url stocks = http("query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.historicaldata where symbol='YHOO' and startDate='" << date("y-0m-0d", -6@months) << "' and endDate='today'&format=json&diagnostics=true&env=http://datatables.org/alltables.env", filter=[Close, Date]) // plot prices ListPlot(stocks(query, results, quote, *, Close), labels=date(stocks(query, results, quote, *, Date), "M3 d"), width=600, height=300, color=purple, gridDash=[10, 2], grid=[5, 2], numbers=[5, 2], ticks=[1, 1], flipAxis=1)

References

http://json.org

Related Functions

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Using MathStudio

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Scripting Language

Variables

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2. Unicode Characters

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Scripts

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4. Variable Controls

5. Conditional Statements

6. For-In Loops

10. Working with JSON

Functions

A

AlternatingSeries(n, [terms])

Angle(A, B)

Animate(variable, start, end, [step], [value], [fps])

Apart(f(x), x)

Append(expression1, expression2)

B

BarPlot(list1, frequency1, ...)

Bernoulli(n, [z])

BesselI(v, z)

BesselJ(v, z)

BesselK(v, z)

BesselY(v, z)

Beta(m, n)

Binomial(n, r)

BinomialCDF(n, p, x)

BinomialPDF(n, p, x)

BodePlot(function, variable, minimum, maximum, mode)

BoxPlot(x, [frequency1], [x2], [frequency2], ...)

Button(name, [list], [value])

G

GCD(n1, n2)

GegenbauerC(n, a, z)

GeoCDF(p, x)

GeoPDF(p, x)

Gradient(function, [varlist], [mode])

Gudermannian(z)

H

HalfRectSineWave(x, [T])

HankelH1(v, z)

HankelH2(v, z)

Harmonic(z)

Heaviside(x)

HermiteH(n, z)

Hessian(function, [varlist], [mode])

HRStoHMS(hours, [digits])

http(url, [filter])

Hypergeom_2F1(a, b, c, z, [mode])

J

Jacobian(function, [varlist], [point])

json(data, [filter])

JuliaPlot(expression, ...)

K

KelvinBei(v, z)

KelvinBer(v, z)

KelvinKei(v, z)

KelvinKer(v, z)

M

Matrix(rows, [columns])

MatrixLU(matrix, [mode])

MatrixMap(matrix, name, [value])

MatrixQR(A)

MatrixSVD(A)

Max(number, ...)

Mean(list)

MedianFit([x], y)

MedianFitModel([x], y)

MedianFitPlot([x], y)

Message(string)

Min(list)

Mod(m, n)

Multinomial(nList)

MultiPlot(plot1, plot2, ...)

MultiPlot3D(expression, ...)

N

nCr(n, r)

NIntegrate(f(x), x, a, b)

NormalCDF(lower, upper, [mu], [sigma])

NormalPDF(x, mu, sigma)

nPr(n, r)

nRoot(z, n, [mode])

Q

QuadraticFit([x], y)

QuadraticFitModel([x], y)

QuadraticFitPlot([x], y)

QuarticFit([x], y)

QuarticFitModel([x], y)

QuarticFitPlot([x], y)

Quotient(f(x), g(x))

R

Random(min, max, [size1], [size2])

RealPart(expression)

Remainder(f(x), g(x))

Replace(expression, old, new)

Reshape(matrix)

Return(expression)

Reverse(list)

Right(expression)

RK4(function, t, y, a, b, y0, N=10)

RK45(function, t, y, a, b, y0, Tol=10E-5, hmax=0.25, hmin=10E-6, N=20)

Round(number, digits)

RowReduce(A)

T

Together(expression)

Trace(variable)

Transpose(A)

TriangleWave(x, [T])

TrigConvert(expression)

TrigExpand(expression)

TrigReduce(expression)

V

Variables(expression)

Variance(list)

VectorPlot(list, ...)

VectorPlot3D(list, ...)

W

While(condition)

Z

Zeta(z, [a])