CSV Operations Examples

Reading CSV Files

Basic CSV Reading

#include <tablr/tablr.h>

int main(void) {
    /* Read with default settings */
    TablrDataFrame* df = tablr_read_csv_default("data.csv");

    if (df) {
        printf("Loaded %zu rows and %zu columns\n",
               tablr_dataframe_nrows(df),
               tablr_dataframe_ncols(df));

        tablr_dataframe_print(df);
        tablr_dataframe_free(df);
    }

    return 0;
}

Custom Delimiter

#include <tablr/tablr.h>

int main(void) {
    /* Read tab-separated file */
    TablrDataFrame* df = tablr_read_csv("data.tsv", '\t', true);

    /* Read semicolon-separated file */
    TablrDataFrame* df2 = tablr_read_csv("data.csv", ';', true);

    tablr_dataframe_free(df);
    tablr_dataframe_free(df2);

    return 0;
}

Writing CSV Files

Basic CSV Writing

#include <tablr/tablr.h>

int main(void) {
    TablrDataFrame* df = tablr_dataframe_create();

    /* Add data... */

    /* Write to CSV */
    if (tablr_to_csv_default(df, "output.csv")) {
        printf("Successfully wrote to output.csv\n");
    }

    tablr_dataframe_free(df);

    return 0;
}

Custom Format

#include <tablr/tablr.h>

int main(void) {
    TablrDataFrame* df = tablr_read_csv_default("input.csv");

    /* Write with custom delimiter, no header */
    tablr_to_csv(df, "output.tsv", '\t', false);

    tablr_dataframe_free(df);

    return 0;
}

Processing Pipeline

#include <tablr/tablr.h>

int main(void) {
    /* Read */
    TablrDataFrame* df = tablr_read_csv_default("input.csv");

    /* Process */
    TablrDataFrame* filtered = tablr_dataframe_head(df, 100);
    TablrDataFrame* sorted = tablr_dataframe_sort(filtered, "Value", true);

    /* Write */
    tablr_to_csv_default(sorted, "output.csv");

    /* Cleanup */
    tablr_dataframe_free(df);
    tablr_dataframe_free(filtered);
    tablr_dataframe_free(sorted);

    return 0;
}