Pretty print in NumPy format, any 1D or 2D C matrix (as long as it is stored in 1D form) by specifying dimensions.

pprint.c

#include <stdio.h>

typedef float fpoint_t; 

void print(fpoint_t* m, int row_size, int col_size)
{

	int i, j;
	printf(" array([");

	if(row_size == 1 || col_size == 1)
	{
		int len = row_size == 1? col_size : row_size;
		
		if(col_size == 1)
		{
			for(i = 0; i < len; i++)
			{
				if(i == len - 1)
					printf("%.2e", m[i]);
				
				else
				{
					if(m[i] >= 0) printf(" %5.2e, ", m[i]);
					else printf("%5.2e, ", m[i]);
					if((i + 1) % 6 == 0) 
						printf("\n\t");
				}	
			}
		}
		else
		{
			for(i = 0; i < len; i++)
			{
				if(i == 0)
					printf(" %.2e\n", m[i]);
				else if(i == len - 1)
					printf("\t %.2e", m[i]);
				
				else
				{
					if(m[i] >= 0) printf("\t %5.2e,\n", m[i]);
					else printf("\t %5.2e,\n", m[i]);
				}	
			}
		}
		
		printf(" ])\n");

		return;
	}

	if (row_size > 10)
	{
		for(i = 0; i < 3; i++)
		{
			if(i == 0)
				printf("[ ");
			else
				printf("\t[ ");
			if(col_size > 10)
			{
				for(j = 0; j < 3; j++)
				{
					if(j < 2)
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e,\t", m[i * col_size + j]);
						else printf("%5.4e,\t", m[i * col_size + j]);
					}
					else
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e, ", m[i * col_size + j]);
						else printf("%5.4e, ", m[i * col_size + j]);
					}

				}

				printf("...,  ");

				if(m[i * col_size + col_size - 3] >= 0) 
					printf(" %5.4e,\t\n\t", m[i * col_size + col_size - 3]);
				else 
					printf("%5.4e,\t\n\t", m[i * col_size + col_size - 3]);

				if(m[i * col_size + col_size - 2] >= 0) 
					printf("   %5.4e,\t", m[i * col_size + col_size - 2]);
				else 
					printf("  %5.4e,\t", m[i * col_size + i]);

				if(m[i * col_size + col_size - 1] >= 0) 
					printf(" %5.4e", m[i * col_size + col_size - 1]);
				else 
					printf("%5.4e", m[i * col_size + col_size - 1]);
			}

			else
			{
				for(j = 0; j < col_size; j++)
				{
					if(j != col_size - 1)
						printf("%.6g, ", m[i * col_size + j]);
					else 
						printf("%.6g", m[i * col_size + j]);
				}
			}
			printf(" ],\n");
		}

		printf("\t...,\n");

		for(i = row_size - 3; i < row_size; i++)
		{
			printf("\t[ ");
			if(col_size > 10)
			{
				for(j = 0; j < 3; j++)
				{
					if(j < 2)
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e,\t", m[i * col_size + j]);
						else printf("%5.4e,\t", m[i * col_size + j]);
					}
					else
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e, ", m[i * col_size + j]);
						else printf("%5.4e, ", m[i * col_size + j]);
					}

				}

				printf("...,  ");

				if(m[i * col_size + col_size - 3] >= 0) 
					printf(" %5.4e,\t\n\t", m[i * col_size + col_size - 3]);
				else 
					printf("%5.4e,\t\n\t", m[i * col_size + col_size - 3]);

				if(m[i * col_size + col_size - 2] >= 0) 
					printf("   %5.4e,\t", m[i * col_size + col_size - 2]);
				else 
					printf("  %5.4e,\t", m[i * col_size + i]);

				if(m[i * col_size + col_size - 1] >= 0) 
					printf(" %5.4e", m[i * col_size + col_size - 1]);
				else 
					printf("%5.4e", m[i * col_size + col_size - 1]);
			}

			else
			{
				for(j = 0; j < col_size; j++)
				{
					if(j != col_size - 1)
						printf("%.6g, ", m[i * col_size + j]);
					else 
						printf("%.6g", m[i * col_size + j]);
				}
			}
			if(i == row_size - 1)
				printf(" ]])\n");
			else
				printf(" ],\n");
		}
	}

	else
	{
		for(i = 0; i < row_size; i++)
		{
			if(i == 0)
				printf("[ ");
			else
				printf("\t[ ");

			if(col_size > 10)
			{
				for(j = 0; j < 3; j++)
				{
					if(j < 2)
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e,\t", m[i * col_size + j]);
						else printf("%5.4e,\t", m[i * col_size + j]);
					}
					else
					{
						if(m[i * col_size + j] >= 0) printf(" %5.4e, ", m[i * col_size + j]);
						else printf("%5.4e, ", m[i * col_size + j]);
					}

				}

				printf("...,  ");

				if(m[i * col_size + col_size - 3] >= 0) 
					printf(" %5.4e,\t\n", m[i * col_size + col_size - 3]);
				else 
					printf("%5.4e,\t\n", m[i * col_size + col_size - 3]);

				if(m[i * col_size + col_size - 2] >= 0) 
					printf("\t   %5.4e,\t", m[i * col_size + col_size - 2]);
				else 
					printf("\t  %5.4e,\t", m[i * col_size + i]);

				if(m[i * col_size + col_size - 1] >= 0) 
					printf(" %5.4e", m[i * col_size + col_size - 1]);
				else 
					printf("%5.4e", m[i * col_size + col_size - 1]);
			}

			else
			{
				for(j = 0; j < col_size; j++)
				{
					if(j != col_size - 1)
						printf("%.6g, ", m[i * col_size + j]);
					else 
						printf("%.6g", m[i * col_size + j]);
				}
			}
			if(i == row_size - 1)
				printf(" ]])\n");

			else
				printf(" ],\n");
		}
	}
}