subscript

Using this code function from a previous stackoverflow: R: How to GeoCode a simple address using Data Science Toolbox require("RDSTK") library(httr) library(rjson) geo.dsk <- function(addr){ # single address geocode with data sciences toolkit require(httr) require(rjson) url <- "http://www.datasciencetoolkit.org/maps/api/geocode/json" response <- GET(url,query=list(sensor="FALSE",address=addr)) json <- fromJSON(content(response,type="text")) loc <- json['results'][[1]][[1]]$geometry$location return(c(address=addr,long=loc$lng, lat= loc$lat)) } Now Example Code. This works fine: City<-c(

this seems to be rather easy, but it keeps my busy since a while. I have a dataframe (df) with n columns and a vector with the same number (n) of values. The values in the vector are thresholds for the observations in the columns in the dataframe. So the clue is, how to tell R to use different thresholds for each column? I want to keep all the observations in the dataframe which fulfill the various thresholds for each column (above or below, doesnt matter in the example). The observations which do not fulfill the threshold criterion should be set to 0. I dont want a subset of the dataframe.

This question already has an answer here: How can I print literal curly-brace characters in python string and also use .format on it? 11 answers I want to write in the legend of a matplotlib figure a variable with a subscript using LaTeX. One possible code for this kind of problem could be: import numpy as np import matplotlib.pyplot as plt a, b = 1, 0 string = "({0},{1})".format(n,l) x = np.linspace(0, 2*np.pi, 1e3) fig = plt.figure(0) ax = plt.subplot(111) ax.plot(x, np.sin(x), 'b', label = r"Function for $E_{}$".format(string)) ax.legend() plt.savefig("example_fig.png") However, this code

I have a class to represent a 3D vector of floats: class Vector3D { public: float x, y, z; float * const data; Vector3D() : x(0.0), y(0.0), z(0.0), data(&x) {} } My question is: are x, y, and z going to be allocated sequentially in memory such that I can assign the address of x to data and later use the subscript operator on data to access the vector components as an array? For example, sometimes I may want to access the vector components directly: Vector3D vec; vec.x = 42.0; vec.y = 42.0; vec.z = 42.0; And sometimes I may want to access them by offset: Vector3D vec; for (int i = 3; i--; ) vec

Im working on an iOS app where I need to store and retrieve from an SQLite DB, a representation of a NSString that has subscripts. I can create a NSString at compile time with a constant: @"Br\u2082_CCl\u2084" \u2082 is a 2 subscript, \u2084 is a 4 subscript. What im storing in the SQLite db is: "Br\u2082_CCl\u2084" But what I can not figure out how to do, is reconvert that back into an NSString. The data comes back from the db as a char * "Br\\u2082_CCl\\u2084" Stripping out the extra slash has made no difference in my feeble experiments. I need a way get that back into an NSString - Thanks!

I have this issue, the error accessing the index of an array. The index should be an integer, but its not working. I have tried initially with a variable, but in this example I have changed it to integer, 0, just to show its no the variable that is the issue. let location = SNStore.Welland[index].locations[0] { if location.timestamp > 0 { } } the error is: Cannot subscript a value of type '[LocationStore]' with an index of type '(Int, () -> ())' So could someone explain why the array doesn't want an int for its index? Its weird and I don't understand. I checked for the declaration of locations