Questions tagged [wolfram-alpha-queries]
Use this for questions about calling Wolfram Alpha from Mathematica. Questions about Wolfram Alpha itself are off-topic.
166
questions
2
votes
2answers
58 views
Wolfram|Alpha query doesn't compute answer
I typed
== integral (e^cosx)((cosx)^2)(sinx) from x=0 to pi
into Mathematica, but it doesn't seem to generate an answer. What did I do wrong?
I entered the query ...
1
vote
1answer
46 views
General: 2456 is not a valid variable [closed]
... is not a valid variable i dont know whats happend
1
vote
0answers
48 views
How to make this expression?
How to code this expression in WolframAlpha. I am interested in how to code the second sum, because it contains a boolean expression:
$$\sum_{i=1}^{100}{\sum_{j>n}}{x_{i}x_{j}}$$
1
vote
0answers
57 views
Why doesn't Mathematica provide an answer while Wolfram|Alpha does, concerning a series convergence?
Among other series I've been working on, I was asked to find whether
$$\sum_n 1-\cos(\frac{\pi}{n})$$
converged, and Mathematica's output to ...
1
vote
4answers
146 views
How can one expand an arbitrary boolean combination into the $2^n$ atoms of the associated boolean algebra of size $2^{2^n}$?
The answer of user250938 to Can one usefully apply the Boolean functions of Mathematica to measurable Boolean sets? and the second comment of
Monroe Eskew to the answer to https://mathoverflow.net/...
0
votes
1answer
93 views
The Branch Cut of the Complex Logarithm Used by Default in Wolfram Alpha
The title says it all: what branch cut (like which value of $k$ in $\ln(z)=\ln(r)+i(\theta+2\pi k))$ does Wolfram Alpha use by default in calculating the complex logarithm. I would say "principal ...
0
votes
1answer
168 views
step-by-step solution unavailable (( possible intermediate steps ))
When using the (( WolframAlpha["integrate 1/(2+Sqrt[1-x]+Sqrt[1+x])"])) function to find integration steps, this message appears to me what is the explanation and ...
4
votes
0answers
42 views
What is the current WolframAlpha server capacity?
Considering the increasing workload WolframAlpha is now receiving as it is getting more tightly integrated into the Wolfram language. With things like Entities even ...
4
votes
0answers
117 views
How to change the Wolfram Alpha query timeout for Ctrl+=?
Sometimes retrieving results from Wolfram Alpha takes time and the default query timeout is not sufficient.
For engagement with Wolfram Alpha implicitly for expr ...
1
vote
1answer
45 views
How can I price of 100 EUR in RON on 1st of every month back to 4 years
I would like to see the difference between 450 RON and 100EUR converted to RON on 1st of every month back to 4 years.
possibly with a cumulated chart...
3
votes
1answer
204 views
Difference between free-form input via WolframAlpha[] and CTRL+=
WolframAlpha["query"] - https://reference.wolfram.com/language/ref/WolframAlpha.html
Free-form input - https://reference.wolfram.com/language/workflow/EnterFreeFormInput.html
For example:
...
2
votes
0answers
336 views
Step by step solution of a limit of a sequence - Calling Wolfram|Alpha in Mathematica
I'd like to visualiza the step-by-step solution of the following limit by calling Wolfram|Alpha in Mathematica, but I don't know how to specify that n is a positive integer variable:
...
1
vote
1answer
73 views
WolframAlpha does not give stepwise solution for a simple twodimensional integral
Why does the behave this particular way:
...
0
votes
1answer
71 views
Quick Wolfram Question [closed]
This is my code so far:
For[i=2, i<10, i++, Solve[x^i == x+1 && x >0]]
I would like to sum up all the x values that it outputs. How can I do so?
1
vote
2answers
178 views
Is there a way to copy/paste an expression from Mathematica into Wolfram Alpha?
For example, I have the expression
$$\int_0^t \frac{\lambda e^{-\lambda x} (\lambda x)^{k-1}}{(k-1)!} \, dx$$
(written that way in Mathematica). Is there a simple way to copy/paste the (in this ...
3
votes
1answer
129 views
Daylight hours vs calendar date
Is there a way in Mathematica or Wolfram Alpha to get a plot of daylight hours vs calendar date and rate of change of daylight hours vs calendar date. Lets say I want the plot for latitude 45 degrees ...
2
votes
2answers
471 views
How to calculate complicated expression in WolframAlpha
I need to evaluate the limit:
$$\lim_{n\to\infty}\prod_{k=1}^\infty \left(1-\frac{n}{\left(\frac{n+\sqrt{n^2+4}}{2}\right)^k+\frac{n+\sqrt{n^2+4}}{2}}\right).$$
I could not type into WolframAlpha ...
4
votes
0answers
71 views
U.S. Treasury Yield Curve via WolframAlfa
Disturbingly coincident with the U.S. Treasury Yield Curve's recent volatility and inversion, the previously highly reliable & available data from the Treasury's website at Treasury's website xml ...
0
votes
2answers
88 views
Wolfram Alpha missing solutions to a quadratic equation over the integers?
I don't have Mathematica, but Wolfram Alpha appears to miss integer solutions to bivariate quadratic equation:
solve over integers X^2 + 1672739 Y^2 = 4680419795530281540
returns only two pairs of ...
2
votes
1answer
36 views
3
votes
0answers
66 views
Querying WolframAlpha from WolframScript
Is it possible to query WolframAlpha from a wolframscript query? The following yields $Failed:
...
1
vote
1answer
98 views
How to create a find-and-replace code in Mathematica?
Let's say I have a group of X's characters that I want to cut down. I want to use a method similar to 'find-and-replace-all' tool from Word, which takes an amount of X's each time, deletes them, and ...
0
votes
1answer
66 views
Could not solve this equation by Solve and also get nearly correct plot by Wolfram|Alpha [closed]
Input:
Solve[y'[x] == -(224.8 ((y[x]^2 - y[x]/10^11 - (0.000010385 x^3)/E^(2 x))/x^2)), y[x], x]
Output:
...
0
votes
0answers
43 views
Is it possible to get the required mathematica code from wolfram alpha input?
It is very easy to get an out put in wolfram alpha if the input is very complicated and mathematica coding giving some problem. So is it possible to convert an wolfram alpha input to a standard ...
0
votes
1answer
70 views
How do I obtain the characteristics and properties of an alloy? [closed]
I would like to obtain the characteristics and properties of the Alloy Chromel. How do I download that information from the database of Wolfram Alpha and then print it in a Mathematica Notebook?
...
2
votes
0answers
50 views
How to get the events and holidays occurred on a list of dates?
I have a list of 100 unix timestamps and I am trying to get all the events occurred on that time. The following code get an abort signal when a has 100 timestamps. Another problem is that when I run ...
0
votes
2answers
295 views
Getting the full result from a Wolfram|Alpha query?
I'm trying to get the list of numbers using this query:
WolframAlpha[
"integers | perfect square and having 9 digits", {{"Result", 1}, "NumberData"}]
By ...
4
votes
1answer
102 views
Discrepancy between area given by CountryData and GeoArea of FullPolygon
CountryData["US", "Area"]
puts the area of U.S. at $9.63\times 10^6 \textrm{ km}^2$, while
...
1
vote
1answer
1k views
Why can't I plot two graphs on the same plane in WolframAlpha?
When I plot these graphs separately everything is OK, but when I try to plot them simultaneously I get error. Why?
0
votes
1answer
127 views
Unexpected omission by Wolfram Alpha [closed]
When Alpha is submitted the equation $a(a^2-1)=2b^2$, it unexpectedly forgets the integer solution $a=1,b=0$. What could explain this ?
http://www.wolframalpha.com/input/?i=a(a%5E2-1)%3D2b%5E2
9
votes
2answers
2k views
Wolfram says sum diverges, but Mathematica gives a numerical value for infinite sum [closed]
Take this sum for example:
$$\sum_{n=2}^\infty\frac1{\log(n!)}$$
Wolfram says that this does not converge by the comparison test. However, when I use Mathematica's ...
4
votes
0answers
118 views
CloudDeploy fails when using WolframAlpha as APIFunction
I am trying to create a Wolfram API that returns, for an input expression, how Wolfram Alpha interprets that input.
For example, given the string "1 plus 2", the API should return "1 + 2".
Locally, ...
1
vote
1answer
120 views
Plot with Wolfram Alpha Scientific Data
Now that Mathematica has already embedded Wolfram Alpha, so I'd like to plot a graph: "Air Density" - "Elevation".
I know that
yields
But I can't do that 10000 ...
1
vote
1answer
35 views
How I can define and arrange following linear equation?
We have:
Theta * (2L-K) = 0 Theta cannot be zero because it's angle parameters.
(2L-K)=0 then We can calculate L=K/2
How we can define this constraint in Wolfram|...
3
votes
4answers
245 views
Conditional Summations
I am not a math major, but for a networking class, I am taking I am required to do summations for probability. I know the logic but I don't know the mathematical theory to make this work. Using ...
5
votes
1answer
125 views
Confusion in finding the definite integral
So, I'm new to Mathematica. I tried evaluating the following definite integral. However the answer i get from wolfram alpha & mathematica are different.
Can someone please point out what I'm ...
1
vote
1answer
62 views
How can I compute how many primes of this kind are up to $N$?
In the following link:
https://oeis.org/A079796/b079796.txt
we can see the first 10,000 prime numbers $p$ with the property that both
$(3p)^2 + p^2 + 3^2$
and
$(3p)^2 - p^2 - 3^2$ are primes
...
0
votes
1answer
1k views
Step-by-step solution of a system of symbolic equations - Call Wolfram Alpha in Mathematica
I'm trying to get a step-by-step solution of a system of symbolic equations:
...
1
vote
0answers
364 views
How to query Wolfram Alpha to find projection of point on plane? [closed]
For example, the projection of the point $P=(1,2,3)$ on the plane $x+y+z=3$ is the point $Q=(0,1,2)$.
How do I ask Wolfram Alpha to compute this? I've tried "projection of point (1,2,3) on plane x+y+...
5
votes
4answers
2k views
How to ask WolframAlpha to find 'x such that p=32*x+1 is prime'
I want to find prime $p$ in form of $p=32 x+1$
How can I ask WolframAlpha for such $x$ that will fulfil this equation?
EDIT: let's say that $100$ or $n$ solutions is enough for me
EDIT2: I need x's ...
0
votes
1answer
543 views
Can I make Wolfram Alpha use a specific substitution when integrating? [closed]
Can I define the '$u = \dots$' for an integral?
For example when I integrate $\frac{x^3}{\sqrt{6 - x^2}}$ with respect to $x$, the program automatically sets $u = x^2$, how can I change this so it ...
3
votes
1answer
115 views
how to get historical data from wolfram alpha
The following command give historical data from 21th April 2017 to 19th April 2018. Which is about 1 year. How do i get this result for past three years from wolfram alpha.
...
2
votes
0answers
62 views
WolframAlpha robustness
I am experiencing return values of Missing[NotAvailable] from WolframAlpha[], about 10% of the time. For some reason, this seems ...
2
votes
3answers
195 views
Find the average GDP of multiple countries at once
How would I find the average GDP of a list of countries between set years?
I know how to do it for one but I'm not sure about multiple values. I also wish to find the average population size.
An ...
1
vote
1answer
152 views
list of dates for vernal equinox
I'm trying to get a list of dates and times of the vernal equinox for the last 30 years (or some other time interval). I'm flailing about and really have gotten nowhere. When I've tried typing ...
0
votes
5answers
420 views
Find optimal integer solution to linear equation (Wolfram Alpha)
I'm sorry if this is potentially off topic, but I posted this question at the Math SE and they pointed me here. Both SE sites have a tag for Wolfram Alpha, but maybe you guys are better equipped to ...
5
votes
1answer
101 views
WolframAlpha function does not return structure diagram for chemicals
Neither one of
WolframAlpha["Caffeine"]
WolframAlpha["Caffeine","FullOutput"]
returns a structure diagram for the molecule. It's consistent since ...
2
votes
1answer
149 views
how to get a relation between two parameters from a single equation
2 (Ļ'[r])^2 - 2 u'[r]/r - (u'[r])^2 - u''[r] == 0
I need to get a relationship between u and ...
3
votes
1answer
270 views
FetchUrl status forbbiden when using Wolfram Alpha query
Strange thing here.
If I try this with Free-form input:
Sqrt[(2^t*Log[2])^2/(1 - 2^(2*t))]
I have no problem... But if I try the same expression in the Wolfram ...
1
vote
1answer
225 views
Interpolating the Treasury yield curve
The following code:
scrapes current U.S. Treasury yield data from the Treasury's website;
plots the available data points (from the 1, 2, 3, 5, 7, 10, 20, and 30 year instruments); and
interpolates &...
