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Error in nanpercentile when all values are NaN and strings


Error in nanpercentile when all values are NaN and strings

By : Josh M
Date : November 20 2020, 11:01 PM
Any of those help The first thing this function does is make sure that the input is an array. Notice what happens when I try several variations on a list
code :
In [1164]: np.array([1,2,3])
Out[1164]: array([1, 2, 3])       # integer array
In [1165]: np.array([1,2,3,np.nan])
Out[1165]: array([  1.,   2.,   3.,  nan])   # float array
In [1166]: np.array([1,2,3,np.nan,'str'])
Out[1166]: 
array(['1', '2', '3', 'nan', 'str'], 
      dtype='<U32')
In [1168]: np.isnan(np.array([1,2,3,np.nan]))
Out[1168]: array([False, False, False,  True], dtype=bool)
In [1169]: np.isnan(np.array([1,2,3,np.nan,'str']))
...
TypeError: ufunc 'isnan' not supported for the input types,...
In [1174]: [i for i in [1,2,3,np.nan,'str'] if not isinstance(i,str)]
Out[1174]: [1, 2, 3, nan]
In [1176]: nlist=[i for i in [1,2,3,np.nan,'str'] if not isinstance(i,str)]
In [1177]: np.array(nlist)
Out[1177]: array([  1.,   2.,   3.,  nan])
In [1178]: np.isnan(np.array(nlist))
Out[1178]: array([False, False, False,  True], dtype=bool)
In [1180]: np.nanpercentile(nlist,.2)
Out[1180]: 1.004
In [1187]: np.nanpercentile([],.2)
/usr/lib/python3/dist-packages/numpy/lib/nanfunctions.py:675: RuntimeWarning: Mean of empty slice
  warnings.warn("Mean of empty slice", RuntimeWarning)
Out[1187]: nan


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Error using if statement when concatonating strings and $_server values to variable

Error using if statement when concatonating strings and $_server values to variable


By : Swedish Snus
Date : March 29 2020, 07:55 AM
Does that help You can't use an if statement inside a variable definition. Use ternary operator instead:
code :
$stuff = "<tr><td>" . (isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '' ) . "</td>";
if (!isset($_SERVER['HTTP_REFERER'])) {
    $_SERVER['HTTP_REFERER'] = '';
}
$stuff = "<tr><td>" . $_SERVER['HTTP_REFERER'] . "</td>";
Is there error propagation when serializing floating point values to strings?

Is there error propagation when serializing floating point values to strings?


By : user2034943
Date : March 29 2020, 07:55 AM
may help you . It depends on the binary-to-decimal conversion function that you use. Assuming this function is not botched (it has no reason to be):
Either it converts to a fixed precision. Old-fashioned languages such as C offer this kind of conversion to decimal. In this case, you should use a format with 17 significant decimal digits. A common format is D.DDDDDDDDDDDDDDDDEXXX where D and X are decimal digits, and there are 16 digits after the dot. This would be specified as %.16e in C-like languages. Converting back such a decimal value to the nearest double produces the same double that was originally printed. Or convert it to the shortest decimal representation that converts back to the same double. This is what some modern programming languages (e.g. Java) offer by default as printing function. In this case, the property that parsing back the decimal representation will return the original double is automatic.
Python: np.nanpercentile, which datatype does my dataframe need to have?

Python: np.nanpercentile, which datatype does my dataframe need to have?


By : Robinatus
Date : March 29 2020, 07:55 AM
To fix this issue I have a panda dataframe of type object. , This did the job for me in the end:
code :
df = df.astype(float)   
Golang template generate values from array of strings error

Golang template generate values from array of strings error


By : user1551385
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further In your final example you have two ranges and only one end (prior to your edit!)
Now that is fixed, are you sure you don't have a space between the dot and Command? Try putting an example on play.golang.org as the errors don't match what you have shown - funcs from funcmap don't have a dot prefix.
code :
// Define a template.
const tmpl = `
{{ range . -}}
{{range $i,$a := .Command}}{{if gt $i 0 }} && {{end}}{{.}}{{end}}
{{end}}
`

// Prepare some data
type App struct {
    Data    string
    Command []string
}
data := []App{App{"test data", []string{"app1", "app2", "app3"}}}

// Create a new template and parse into it.
t := template.Must(template.New("tmpl").Parse(tmpl))

// Execute the template with data
err := t.Execute(os.Stdout, data)
if err != nil {
    log.Println("executing template:", err)
}
Error: header values must be strings Error: advanced-http: header values must be strings ionic

Error: header values must be strings Error: advanced-http: header values must be strings ionic


By : Dee
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I would like to retrieve data from API to ionic. First, I was facing issue of CORS and unable to retrieve data from different devices except original port. I was trying to use http native to retrieve data on device. I have a problem of getting header from API. I am not allowed to modify server. However, I ended up with error as below : Please guide me how to use http native in ionic. , Here is my header below :
code :
getMcsHeadersString() {
var cheaders = {};
for (let key in this.mcs.mobileBackend.getHttpHeaders()) {
  cheaders[key]= this.mcs.mobileBackend.getHttpHeaders()[key];
}
//console.log("STring_HeaderKey_"+cheaders['_keys']+"HeaderValue_"+cheaders['_values']);
delete cheaders['_keys'];
delete cheaders['_values'];
return cheaders;
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