I am making an R-script to get all of the mentions (#username) of a specific set of users.
My first issue isn't a big deal. I try to work at home, as well as work. At work, the code works fine. At home, I get Error 32 - Could not authenticate you from Oauth. This is using the exact same code, key, secret, token. I have tried resetting my secret key/token, same thing. Not a problem, since I can do remote login, but its frustrating.
The REAL issue here...
I construct a URL (ex: final_url = "https://api.twitter.com/1.1/search/tweets.json?q=#JimFKenney&until=2015-10-25&result_type=recent&count=100")
Then I search twitter for my query of #usernameDesired to get all the comments where they were mentioned.
mentions = GET(final_url, sig)
This works fine, but then I want my data in a usable format so I do...
library(rjson)
#install.packages("jsonlite", repos="http://cran.rstudio.com/")
library(jsonlite)
#install.packages("bit64", repos="http://cran.rstudio.com/")
json = content(mentions)
I then get the following error -
$statuses
Error in .subset2(x, i, exact = exact) : subscript out of bounds
I don't have even the first idea of what can be causing this.
Any help is gratly appreciated.
EDIT 1: For Clarity, I get the error when trying to see what is in json. If I do "json = content(mentions)" that line of code executes fine. I then type "json" to see what is in the variable, and I get the above error that starts with $statuses.
Related
I am using RANSAC to fit a line to my data. The data is 30X2 double, I have used MatLab example to write the code given below, but I am getting an error in my problem. I don't understand the error and unable to resolve it.
The link to Matlab example is
https://se.mathworks.com/help/vision/ref/ransac.html
load linedata
data = [xm,ym];
N = length(xm); % number of data points
sampleSize = 2; % number of points to sample per trial
maxDistance = 2; % max allowable distance for inliers
fitLineFcn = polyfit(xm,ym,1); % fit function using polyfit
evalLineFcn =#(model) sum(ym - polyval(fitLineFcn, xm).^2,2); % distance evaluation function
[modelRANSAC, inlierIdx] = ransac(data,fitLineFcn,evalLineFcn,sampleSize,maxDistance);
The error is as follows
Error using ransac Expected fitFun to be one of these types:
function_handle
Instead its type was double.
Error in ransac>parseInputs (line 202) validateattributes(fitFun,
{'function_handle'}, {'scalar'}, mfilename, 'fitFun');
Error in ransac (line 148) [params, funcs] = parseInputs(data, fitFun,
distFun, sampleSize, ...
Lets read the error message and the documentation, as they tend to have all the information required to solve the issue!
Error using ransac Expected fitFun to be one of these types:
function_handle
Instead its type was double.
Hum, interesting. If you read the docs (which is always the first thing you should do) you see that fitFun is the second input. The error says its double, but it should be function_handle. This is easy to verify, indeed firLineFun is double!
But why? Well, lets read more documentation, right? polyfit says that it returns an array of the coefficient values, not a function_hanlde, so indeed everything the documentation says and the error says is clear about why you get the error.
Now, what do you want to do? It seems that you want to use polyfit as the function to fit with ransac. So we need to make it a function. According to the docs, fitFun has to be of the form fitFun(data), so we just do that, create a function_handle for this;
fitLineFcn=#(data)polyfit(data(:,1),data(:,2),1);
And magic! It works!
Lesson to learn: read the error text you provide, and the documentation1, all the information is there. In fact, I have never used ransac, its just reading the docs that led me to this answer.
1- In fact, programmers tend to reply with the now practically a meme: RTFM often, as it is always the first step on everything programming.
I've been trying to replicate the "A simple example" posted at https://dash-julia.plotly.com/clientside-callbacks
The server runs... but when I connect to it I get a JSON parse error in Firefox.
I was able to solve the problem, but I'd like to understand what's wrong...
The problem was this line inside the Dash app.layout:
options=[(label = country, value = country) for country in available_countries]
and the available_countries variable was obatined from:
read_remote_csv(url) = DataFrame(CSV.File(HTTP.get(url).body))
df = read_remote_csv("https://raw.githubusercontent.com/plotly/datasets/master/gapminderDataFiveYear.csv")
available_countries = unique(df.country)
Apparently the error showed because available_countries was an Array{String31,1}: and specifically the problem was the String31 type.
when I converted the variable to a plain String type:
available_countries = convert(Array{String,1},available_countries)
the problem solved.
Now... I'm not sure if the String31 type came from the HTTP.get(), CSV.File() or the DataFrame() functions.
I'm assuming the example used to work when it was originally written but it broke with an update...
Can anyone explain where exactly the error originates? Is it a Package version thing? which package? (HTTP, CSV, Dataframes)? How can I avoid it moving on?
With a lot of help from people in this site, I managed to get some Json data from an amazon page. The data, for example, looks like this.
https://jsoneditoronline.org/?id=9ea92643044f4ac88bcc3e76d98425fc
First I have a list of strings which is converted to a string.
script = response.xpath('//script/text()').extract()
#For example, I need the variationValues data
variationValues = re.findall(r'variationValues\" : ({.*?})', ' '.join(script))[0]
Then, in my code, I have this (not a great name, will be changed later)
variationValuesJson = json.loads(variationValues)
variationValuesJson is in fact a dictionary, so doing something like this
variationValues["size_name"][3]
Should return "5.5 M US"
My issue is that, when running the program, I get the string indices must be integers error. Anyone knows whats wrong?
Note: I have tried using 'size_name' instead of "size_name", same error
variationValues["size_name"][3] #this is the raw string which you have converted to variationValuesjson
I think this is not what you actually want.
Your code should be this.
variationValuesJson['size_name'][3] #use variationValuesjson ;)
I have a website URL that I am trying to turn into a hyperlink using R that displays the first 25 characters for a shiny page. The code that use to do that is below.
val <- "https://www.google.com/"
sprintf(paste0('', substr(val, 1, 25) ,''))
If val is set equal to the login page for National Instruments where on my chrome browser the information is autofilling for a saved username and password based on one of my past logins that I saved:
val <- "https://lumen.ni.com/nicif/us/LMS_LOGIN/content.xhtml?du=http%3A%2F%2Fsine.ni.com%3A80%2Fmyni%2Fself-paced-training%2Fapp%2Fmain.xhtml%3Fsessionid%3D3-E63B1535-F81F-46C9-A867-E3176E756971%26requestedurl%3Dlearncenter%252Easp%253Fid%253D178409%2526page%253D1"
the sprintf function throws the error Error in sprintf(paste0("<a href=\"", URLdecode(val), "\" target=\"_blank\">", : too few arguments
The issue appears to be towards the end. If the link is truncated before the %252Easp, the sprintf function works as intended. This is the first I have worked with html, so as far as my initial research goes, the R function URLdecode should take care of special characters to ensure that this doesn't happen. If someone could explain to me why this is throwing the error it is and how to fix it I would greatly appreciate it.
got a quick question about the JSON XBMC API. I want to use the GetInfoLabels command to get a lot of information about the system on my webpage. But I can't figure out how this command works. I tried the following
http://192.168.5.34/jsonrpc?request={"jsonrpc":"2.0","id":"1","method":"XBMC.GetInfoLabels","params":["Network.IPAddress","Network.MacAddress"]}
But then I get this output
{"error":{"code":-32602,"data":{"method":"XBMC.GetInfoLabels","stack":{"message":"Invalid type string received","name":"labels","type":"array"}},"message":"Invalid params."},"id":"1","jsonrpc":"2.0"}
So the error is "Invalid type string received" but I can't get it to work. I tried only 1 label, without the quotes, between extra {}, ... Most of them give a "Parse errro" so I think this is the best I could get it. ANy one got an idea how to use this command?
Thanks
Ok, after a lot of research it seems I had to make an object of an array of labels. So this is the working solution
http://192.168.5.34/jsonrpc?request={"jsonrpc":"2.0","method":"XBMC.GetInfoLabels","params":{"labels": ["Network.IPAddress","Network.MacAddress"] },"id":1}
As a result you get the IP and MAC from the XBMC system.