l2p | create pictures from latex math expressions | Math library
kandi X-RAY | l2p Summary
kandi X-RAY | l2p Summary
l2p - create pictures from latex math expressions. l2p is a command-line tool to create png images of math expressions, formatted in the latex typesetting language. while it can convert a whole document, it is designed to easily generate images from just a fragment of latex code, without you needing to build a separate latex markup file. a large set of options provide great control and finesse over the resulting image. l2p -i '$4x^2-7=\cos{2 \pi x}$' -o eqn4.png. produce a png image, named 'eqn4.png', of the equation described by the latex expression '$4x^2 - 7 = \cos{2 \pi x}$'. l2p -d 250 -i '$\nabla \cdot \mathbf{d} = \rho$'. produce a png image from the latex code given with the -i argument (which happens to be one
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QUESTION
I have a linear system with a 60000x60000 matrix that I wish to solve, with about 6,000,000 nonzero entries in it.
My current approach is to reorder the matrix with reverse cuthill mckee, factorize the matrix, and then solve it with preconditioned conjugate gradient, but I'm not getting very good results and I don't understand why. The reordering looks reasonable.
Below I have attached a simple example where I only use a subsystem of the matrix I'm trying to solve.
...ANSWER
Answered 2020-May-04 at 11:49There is a high chance that you are doing nothing wrong within your current approach (at least, I was not able to spot an obvious bug).
A couple of notes:
- Residual of
29.10655954230801and2.5236861383747353after 500 iterations are effectively the same: your iterative solution has not converged. - You seem to request a very high iterative solver tolerance of
1E-12. That would not matter here, as you have a problem that does not converge at all. - Factorization (of ILU) should take approximately this time. I am not surprised to see this number for such a system. Not so familiar with this implementation of Cuthill-McKee.
Without knowing where your system comes from, it would be very hard to say anything. However:
- Check the condition number for your small version of the matrix (if it is somewhat representative of your original problem). High condition number would indicate a problem with the conditioning of the matrix; thus, potential poor convergence or ill-convergence of the iterative solution (or any type of solution in the extreme case).
- Conjugate gradient is intended for systems that are symmetric and positive-definite. It can converge for other cases; however, it can fail for well-conditioned problems that are not positive-definite.
QUESTION
I've just started to experience this a week ago and I've tried a number of things, but it keeps happening. It starts with a failed commit error message:
Can't set position pointer in file '(revision path)': An attempt was made to move the file pointer before the beginning of the file.
Upon getting it the first time, I found some resources that indicated some kind of corruption in the latest revision. I looked into how to delete a revision, and I followed this process to create a new repo and dump the non-corrupt revisions into it. That was successful but quite a burdensome process to have to repeat over and over.
The second time it happened, I found this resource which explained how to delete the corrupt revision directly in the repo folder structure and set the current revision back to the prior one. That worked and was quicker than the aforementioned method, but still not something I wish to keep repeating.
Then it happened again today.
Each of these times I've used svnadmin verify and gotten this (with different revision numbers each time obviously):
svnadmin verify (repo path) * Verifying metadata at revision 0 ... * Error verifying repository metadata. svnadmin: E160058: l2p index entry PHYS -1does not match p2l index value LOG r391:i10 for PHYS 1407
I googled that error but literally nothing exists, no results whatsoever for that error code or the other junk in that cryptic message.
Please help me figure out how to stop this from happening.
EDIT: After successfully committing something like 8 more revisions, I got a new error this time:
Item index 69 too large in revision 398
svnadmin verify reports:
Unexpected end of index file (repo path)/db/revs/0/396 at offset 0x43c8.
Here is what is at that offset. It doesn't seem like the end of anything:
Research also indicates corruption. What in the world is happening?
...ANSWER
Answered 2019-Oct-23 at 12:43- There is no such thing as a "TortoiseSVN repository". You have a Subversion repository and most likely you access it incorrectly causing the corruption.
- Most likely you store the repository on a network share and access it via the file:// protocol. If it is your case, read https://tortoisesvn.net/faq.html#reponoserver.
QUESTION
When I C code compile and exit, I get a segmentation fault. When I tried to run GDB, the result is as follows:
...ANSWER
Answered 2018-May-14 at 03:47What is the cause of this segmentation fault?
Insufficient memory allocated.
Size of an int is less than the size of unsigned long long here. @SHG
Avoid size calculation errors - of which there is 1, the inner most.
Allocate to the size of the object, not the type.
QUESTION
package test.arraylist;
import java.util.Scanner;
public class TestArraylist {
static Scanner keyboard = new Scanner (System.in);
static int how_many;
public static void main(String[] args) {
menu();
}
public static void menu()
{
System.out.println("1.L2C");
System.out.println("2.M2R");
int menu = keyboard.nextInt();keyboard.nextLine();
switch (menu){
case 1:
NewClass l2c = new NewClass();
System.out.println("How many:");
how_many = keyboard.nextInt();keyboard.nextLine();
for (int i=0;iANSWER
Answered 2018-Mar-26 at 13:57If you call seats(), you will have an error because those variables are not declared within the proper scope. To make r2p and l2c available within that method, move the variable declarations outside of the method (below the class declaration, before main()) with the initializer private static NewClass newClass;. Feel free to assign a value as needed, or employ optionals (but considering you’ve only been doing Java for 2 weeks, stay away from optionals; just make sure you assign a value).
Edit: Use static modifier on the variables, since you’re accessing from a static context.
QUESTION
Here is sample code (https://jsfiddle.net/meb4wnLd/6/):
...ANSWER
Answered 2018-Jan-09 at 18:49I checked your code, seems there is a lot wrong with it, the fundamental problem is that, you are attaching the tooltip to the body tag instead of the individual plots, hence even if we hover over the second graph, the tool tip will appear relative to the body tag, hence we find it in the same location, the solution for this is to add the tooltip to the individual charts.
QUESTION
I'd appreciate it very much if anyone could give me pointers on what I need to fix. I'm new to TensorFlow and I have no idea what is going wrong.
The code:
...ANSWER
Answered 2017-Oct-23 at 23:00Your imgData method has a typo: you should write out char instead of W if I understand correctly (see documentation of ImageDraw.draw.text). Otherwise, your golden label will be always the character of W. That's why you always get an accuracy of 0.0384 which is 1/26, i.e. you only learn to recognize one of the 26 characters (which is expected, because you never provide labels for other characters other than W).
QUESTION
When debugging a kernel running on the simics-x86-core-i7-x58-ich10 target, how to print the physical memory map?
memory-map seems to print only the physical memory space mapping for objects (ram, apic, vga, etc.).
l2p print the mapping for a specific logical address, not for all the mapping.
ANSWER
Answered 2017-Aug-31 at 15:33You can use cpu0.tlb.[core_number][thread_number].status or cpu1.tlb.[core_number][thread_number].status, etc.
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