Searching Data¶
You can search the quandl database using the quandlsearch function.
This function supports one positional argument (the string you are
searching for), and four keyword arguments:
page, which is the page returned by the search (default is1);results, which is the number of the results per-page (default is20);quiet, which indicates whether the function prints information on screen or not (default isfalse);format, which is the datatype where output is aggregated (default is"DataFrame", but you can also use"Dict").
julia> df = quandlsearch("GDP USA", results=30)
Returning 30 results of 746200 from page 1
30x5 DataFrame
|-------|-----------|-------------|---------|
| Col # | Name | Eltype | Missing |
| 1 | Code | ASCIIString | 0 |
| 2 | Name | ASCIIString | 0 |
| 3 | Frequency | ASCIIString | 0 |
| 4 | From | ASCIIString | 0 |
| 5 | To | ASCIIString | 0 |
julia> names(df)
5-element Array{Symbol,1}:
:Code
:Name
:Frequency
:From
:To
julia> df[:Name]
30-element DataArray{ASCIIString,1}:
"United States: GDP (current LCU)"
"United States: GDP growth (annual %)"
"United States: GDP deflator, LCU"
"United States: GDP (constant LCU)"
"France: GDP, current US\$, millions"
"Netherlands: GDP Potential, constant US\$, millions"
"India: GDP Discrepancy, current US\$, millions"
"Lesotho: GDP Discrepancy, current US\$, millions"
"Vanuatu: GDP (constant 2000 US\$)"
"Fiji: GDP, current US\$, millions"
⋮
"Czech Republic: GDP (current US\$)"
"Grenada: GDP (current US\$)"
"Mauritania: GDP (current US\$)"
"Ethiopia: GDP, current US\$, millions"
"South Africa: GDP, constant US\$, millions"
"Pakistan: GDP (constant 2000 US\$)"
"Albania: GDP Discrepancy, constant US\$, millions"
"Nepal: GDP (constant 2000 US\$)"
"Mongolia: GDP Discrepancy, constant US\$, millions"
"United States: GDP Discrepancy, constant LCU, millions"
A dictionary datatype is also supported.
julia> s = quandlsearch("GDP USA", format="Dict"); # Here 's' is an array of dictionaries
julia> s[1] # This first dictionary looks ugly on REPL
["from_date"=>"1960-12-31","code"=>"USA_NY_GDP_MKTP_CN","name"=>"United States: GDP (current LCU)","source_code"=>"WORLDBANK","id"=>2582933,"updated_at"=>"2014-05-17T12:32:40Z","private"=>false,"description"=>"GDP at purchaser's prices is the sum of gross value added by all resident producers in the economy plus any product taxes and minus any subsidies not included in the value of the products. It is calculated without making deductions for depreciation of fabricated assets or for depletion and degradation of natural resources. Data are in current local currency.\nGDP (current LCU)","urlize_name"=>"United-States-GDP-current-LCU","display_url"=>"http://api.worldbank.org/countries/USA/indicators/NY.GDP.MKTP.CN?per_page=1000","column_names"=>{"Date","Value"},"source_name"=>"World Bank","frequency"=>"annual","type"=>nothing,"to_date"=>"2012-12-31"]
julia> s[1]["name"]
"United States: GDP (current LCU)"
julia> s[1]["updated_at"]
"2014-05-17T12:32:40Z"
Interactive search¶
Our API also provides a interactive search environment to be used inside
Julia’s REPL. To use it, simply call interactivequandl function.
julia> a = interactivequandl("USA GDP")
1 WORLDBANK/USA_NY_GDP_MKTP_CN From 1960-12-31 to 2012-12-31
United States: GDP (current LCU)
2 WORLDBANK/USA_NY_GDP_MKTP_KD_ZG From 1961-12-31 to 2012-12-31
United States: GDP growth (annual %)
3 WORLDBANK/USA_NYGDPMKTPXN From 1960-12-31 to 2015-12-31
United States: GDP deflator, LCU
4 WORLDBANK/USA_NY_GDP_MKTP_KN From 1960-12-31 to 2012-12-31
United States: GDP (constant LCU)
5 WORLDBANK/FRA_NYGDPMKTPCD From 1960-12-31 to 2015-12-31
France: GDP, current US$, millions
6 WORLDBANK/NLD_NYGDPPOTLKD From 1961-12-31 to 2015-12-31
Netherlands: GDP Potential, constant US$, millions
7 WORLDBANK/IND_NYGDPDISCCD From 1960-12-31 to 2015-12-31
India: GDP Discrepancy, current US$, millions
8 WORLDBANK/LSO_NYGDPDISCCD From 1960-12-31 to 2015-12-31
Lesotho: GDP Discrepancy, current US$, millions
9 WORLDBANK/VUT_NY_GDP_MKTP_KD From 1979-12-31 to 2012-12-31
Vanuatu: GDP (constant 2000 US$)
10 WORLDBANK/FJI_NYGDPMKTPCD From 1960-12-31 to 2014-12-31
Fiji: GDP, current US$, millions
11 WORLDBANK/ECU_NYGDPPOTLKD From 1961-12-31 to 2015-12-31
Ecuador: GDP Potential, constant US$, millions
12 WORLDBANK/LBY_NYGDPMKTPKD From nothing to nothing
Libya: GDP, constant US$, millions
13 WORLDBANK/ERI_NY_GDP_MKTP_CD From 1992-12-31 to 2012-12-31
Eritrea: GDP (current US$)
14 WORLDBANK/UZB_NY_GDP_MKTP_CD From 1990-12-31 to 2012-12-31
Uzbekistan: GDP (current US$)
15 WORLDBANK/CZE_NYGDPMKTPKD From 1961-12-31 to 2015-12-31
Czech Republic: GDP, constant US$, millions
16 WORLDBANK/SLV_NY_GDP_MKTP_CD From 1960-12-31 to 2012-12-31
El Salvador: GDP (current US$)
17 WORLDBANK/ARG_NY_GDP_MKTP_CD From 1962-12-31 to 2012-12-31
Argentina: GDP (current US$)
18 WORLDBANK/USA_NY_GNS_ICTR_ZS From 1970-12-31 to 2012-12-31
United States: Gross savings (% of GDP)
19 WORLDBANK/SOM_NY_GDP_MKTP_CD From 1960-12-31 to 1990-12-31
Somalia: GDP (current US$)
20 WORLDBANK/TZA_NY_GDP_MKTP_KD From 1988-12-31 to 2012-12-31
Tanzania: GDP (constant 2000 US$)
==> Enter n° of the dataset to be downloaded | (N)ext page | (Q)uit
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==>
In REPL, the environment is printed with color and is easier to read.
This function supports one positional argument (the string you are searching for), and eight keyword arguments:
page, which is the page returned by the search (default ispage=1);results, which is the number of the results per-page (default isresults=20);order, which is the order in which the returned Dataset is sorted (default isdes);rows, which is the number of rows that the returned Dataset will have (default is100);frequency, which is the frequency desired for the Dataset (default isdaily);transformation, which is the calculation Quandl do to to Dataset prior to download (default isnone);auth_key, which is user’s API key (see the next section for further information);format, which is the type returned by the function (default is"TimeArray", but you can use"DataFrame"also)