How do I make a chart based on labeled values in Google Sheets?

I have a simple data set with nine values in Google Sheets. (Link here, screenshot follows.) How do I make this into chart based on distinct values in the first two columns. (Mockup follows.) I tried choosing the range A1:C10 in different combinations as the data range, to no avail.

  • I can concatenate Columns A and B, if that helps.
  • It would be nice to have distinct colors based on Column B, as in the mockup.
  • It would be nice to label the numerical values, and even better if the labels can reflect different units, as in the mockup.

sheet
mockup

Efficient way to import a sequence of data labeled with a parameter value

Suppose we have a number of data in .m format, which are labeled with the value of a parameter $c$, for example, c=0data.m, c=0.2data.m, c=0.4data.m, c=0.6data.m, c=0.8data.m, c=1data.m, …

Now, we need to import these data and assign them to solc0, solc2, solc4,…, solc10 for batch processing. I use the following Do loop with ToString:

Do[solc<>ToString[i] = << "C:\Users\c="<>ToString[i/10]<>data.m", {i, 0, 10, 2}]

which generates lots of errors. Can anyone point out what I overlooked? Thank you.

Graphics – Create a binary tree in which nodes are labeled according to the specified rule

I want to draw a binary tree in Mathematica in which the nodes are labeled according to a certain rule. Indeed, a rule determines whether a node has a left child, a right child, or both. And then I also want to label each node according to a rule. How do I do that? I can do this fairly easily in programming languages ​​like Java / Kotlin. But Mathematica has the advantage of a nice drawing and that's what I want (plus the rules are math equations, etc.). How could I do that?

Add an example

For example, suppose it is a BST and a random function generates the values. And the name of each node is a random letter, followed by the order in which that node was added, such as "c7".

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Plotting – How to create a labeled categorical heat map in Mathematica

Given the data: {{1.4, 0}, {0, 1.0}} I can create a heat map with

DensityHistogram [{{1.4, 0}, {0, 1.0}}, {1}]

Enter the image description here

However, the ticks are not informative. The heat map must show the actual labels for each column and row. I need something like:

Enter the image description here

How can I achieve this? I tried to resize the container, but the numbers and checkmarks remain. it just changes their distance.

Plot – add a zero checkmark labeled 0

I don't know if it's possible with Ticks. Here is one way to achieve the desired result Frame and FrameTicks::

plot1 = Plot[2*x, {x, 0, 1}, Frame -> {{True, False}, {True, False}}, 
  FrameTicks -> {{{0, 1}, All}, {{{0, "0"}, 1}, All}}, 
  PlotRangePadding -> 0]

Enter the image description here

plot2 = RegionPlot[{x >= y}, {x, 0, 1}, {y, 0, 1}, 
  Frame -> {{True, False}, {True, False}}, 
  FrameTicks -> {{{0, 1}, All}, {{{0, 0}, {0.5, "a"}, 1}, All}}, 
  PlotRangePadding -> 0]

Enter the image description here

Coding Style – Is It Bad To Break Out Of A Labeled Block In Java?

I sometimes write Java code that looks like:

success: {
    fail: {
        if (...) break fail;
        // some code
        if (...) break fail;
        // some code
        if (...) break fail;
        // some code
        break success;
    }
    // failure handling code
}

Is this bad practice? I could extract this to a method that returns one OptionalThen call this method from the main method, but I'm worried that it will affect performance.

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Domain Name System – How to write a middleware DNS server labeled "I don't know the answer, ask this name server".

I am implementing a middleware DNS server (I know, I know, I probably shouldn't) to create a DNS based service discovery (like Kubernetes) for my infrastructure.

I am currently using a go-based DNS library and it has been running smoothly so far. I am using this server localhost:53 of all my machines (by overwriting the nameserver in /etc/resolv.conf).

All DNS questions in my infrastructure go through this custom DNS server I wrote.

I want to deal with this middleware DNS server:

  • local domains (e.g. *.foo.local.): No problem here.

  • external domains (e.g. example.com.): Forward (NOT proxy or recursion) the clients to the original nameserver the machine (e.g. the original value that I save in /etc/resolv.conf)

In order to implement the last point above, I have to answer DNS queries as follows: "I don't know the answer to this message, query this other name server". Is there something that customers recognize?

So far I have tried to answer with rcode: NOERROR and send NS RRs with
the IP address of the original name server in the response area. That didn't work (customers don't understand).

(I can implement recursion in my DNS server, but I prefer not to.)


Aside: I have found that some public DNS servers (not all like 8.8.8.8 or 1.1.1.1) actually respond with a "permission section" pointing to other name servers.

For example, here is the Comcast's DNS server (75.75.75.75) that responds to a .dev domain search by sending it to Google Domains name servers:

dig +norecurse @75.75.75.75 ahmet.dev.

; <<>> DiG 9.10.6 <<>> +norecurse @75.75.75.75 ahmet.dev.
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21419
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 11

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;ahmet.dev.         IN  A

;; AUTHORITY SECTION:
dev.            72560   IN  NS  ns-tld4.charlestonroadregistry.com.
dev.            72560   IN  NS  ns-tld2.charlestonroadregistry.com.
dev.            72560   IN  NS  ns-tld5.charlestonroadregistry.com.
dev.            72560   IN  NS  ns-tld3.charlestonroadregistry.com.
dev.            72560   IN  NS  ns-tld1.charlestonroadregistry.com.

;; ADDITIONAL SECTION:
ns-tld4.charlestonroadregistry.com. 158960 IN A 216.239.38.105
ns-tld4.charlestonroadregistry.com. 158960 IN AAAA 2001:4860:4802:38::69
ns-tld2.charlestonroadregistry.com. 158960 IN A 216.239.34.105
ns-tld2.charlestonroadregistry.com. 158960 IN AAAA 2001:4860:4802:34::69
ns-tld5.charlestonroadregistry.com. 158960 IN A 216.239.60.105
ns-tld5.charlestonroadregistry.com. 158960 IN AAAA 2001:4860:4805::69
ns-tld3.charlestonroadregistry.com. 158960 IN A 216.239.36.105
ns-tld3.charlestonroadregistry.com. 158960 IN AAAA 2001:4860:4802:36::69
ns-tld1.charlestonroadregistry.com. 158960 IN A 216.239.32.105
ns-tld1.charlestonroadregistry.com. 158960 IN AAAA 2001:4860:4802:32::69

;; Query time: 56 msec
;; SERVER: 75.75.75.75#53(75.75.75.75)
;; WHEN: Sat Feb 29 15:56:32 PST 2020
;; MSG SIZE  rcvd: 394

I don't quite understand how someone adds an authority section to a message (is that just a "reply section" with NS records?).

So it seems that a name server can actually answer questions by sending the client to another name server? How do I implement this answer myself?